ci: Add a workflow to check pull request title for correct prefix. #3080
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This PR adds a workflow to check the prefix of pull request titles to make sure that the start with a prefix and that the prefix is in the list of known good prefixes: feat, fix, security, notice, ci, chore, test, docs
I initially tested this in my fork. Unfortunately, the PR title as seen by the workflow logic does not get updated after PR creation. In other words, you can edit and change the PR title after initial creation, but the workflow only ever gets the initial value. So, if this check finds a problem with the PR title, the solution is to close the PR with the "bad" title/prefix and open another one with a correct prefix.