Discord bot pings nightly testers despite no changes

[altotin]

What went wrong?

today's build https://github.com/grimmory-tools/grimmory/actions/runs/24621441293
has nothing new merged, but was announced by the bot with a ping to @Nightly Testers and link to the empty changelog

How can we reproduce it?

n/a

What Build of Grimmory are you on?

Stable

Your setup

n/a

Screenshots or error messages (optional)

No response

Before submitting

• I've searched existing discussions and this hasn't been reported yet
• I've reviewed this report and have completed it as fully as I can

[zachyale]

Moved to #769