refactor: Bump mongodb-runner from 6.7.3 to 6.8.3

Bumps [mongodb-runner](https://github.com/mongodb-js/devtools-shared) from 6.7.3 to 6.8.3.
- [Commits](https://github.com/mongodb-js/devtools-shared/compare/mongodb-runner@6.7.3...mongodb-runner@6.8.3)

---
updated-dependencies:
- dependency-name: mongodb-runner
  dependency-version: 6.8.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]