"Unable to resolve link" scaladoc warnings on the CI

[mbovel]

test and community_build_* CI jobs report thousands of Scaladoc warnings every time:

[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'new-types/intersection-types.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'new-types/union-types.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'new-types/type-lambdas.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/context-functions.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'other-new-features/trait-parameters.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/early-initializers.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/givens.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/using-clauses.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/extension-methods.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'other-new-features/opaques.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/package-objects.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'other-new-features/export.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'changed-features/vararg-splices.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'other-new-features/creator-applications.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/early-initializers.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/conversions.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/given-imports.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/type-projection.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'contextual/multiversal-equality.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'changed-features/operators.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/delayed-init.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/existential-types.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/procedure-syntax.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/class-shadowing.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/xml.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/symlits.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/auto-apply.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/weak-conformance.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'new-types/intersection-types.md'
[warn] -- Warning: ./docs/_docs/reference/overview.md ---------------------------------
[warn] /__w/scala3/scala3/./docs/_docs/reference/overview.md: Unable to resolve link 'dropped-features/xml.md'
...

Example: https://github.com/scala/scala3/actions/runs/14361375561/job/40263505023#step:9:7281.

Can we hide them?