This action will automatically configure git blame to use the .git-blame-ignore-revs file while it
exists. A typical use of this file is to run trunk fmt -a on a repository. Commit those changes,
and then add the git commit sha256 to that file. This will cause git blame to skip that formatting
commit when deciding who last changed each line.
See also: https://git-scm.com/docs/git-blame#Documentation/git-blame.txt-blameignoreRevsFile