Warnings could use Alerts Markdown extension

[xtqqczze]

Instead of:

⚠️ Warning ⚠️

There are issue links (such as 123) in the commit messages of the following commits.
Please move them to the PR description, to avoid spamming the issues with references to the commit, and so this bot can automatically canonicalize them to avoid issues with subtree.

We could use:

Warning

There are issue links (such as 123) in the commit messages of the following commits.
Please move them to the PR description, to avoid spamming the issues with references to the commit, and so this bot can automatically canonicalize them to avoid issues with subtree.

https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts

[Urgau]

I like GitHub alerts, but on this one, our variant is more visibly/catchy IMO.

[apiraino]

Just to be sure I understand: does this question refer to the check_commits formatting?

[xtqqczze]

That's right, in check_commits.