OEP-51: "squash" conventional commit review open for 24 hours

A PR has been opened proposing “squash” as a new label for conventional commits in OEP-51.

See docs: add squash conventional commit prefix (OEP-51) by robrap · Pull Request #254 · edx/open-edx-proposals · GitHub

The review period for this change will only be 24 hours.

This got merged as a different PR: docs: OEP-51: conventional commit linting exceptions by robrap · Pull Request #258 · edx/open-edx-proposals · GitHub.

After discovering that commitlint ignores git’s “squash! …” and “fixup! …” commit messages, this update mostly just documents this fact and reminds engineers to use these, rather than “temp:”, for temporary commits.