Version of the Action
v4.1.0

Describe the bug
Maybe this only requires a bit more documentation. However, it's not clear which syntax file_pattern uses, and under what conditions. Is it a bash glob? Or some other language? Why are the asterixes escaped? The bash syntax \{\*\*/PKGBUILD,\*\*/.SRCINFO\} does not work (escaped out so Workflows doesn't complain about the syntax), and neither does \*\*/PKGBUILD \*\*/.SRCINFO or any combination of syntax I've tried. Wrapping the glob in quotes, various permutations of escaping; I've tried several things.

Curiously, I can see globbing working, except it fails somehow when actually doing the git commit. In many cases, I get errors like:

INPUT_BRANCH value: 
M	aur-bin/.SRCINFO
M	aur-bin/PKGBUILD
M	aur/.SRCINFO
M	aur/PKGBUILD
Your branch is up to date with 'origin/master'.
INPUT_FILE_PATTERN: \{\*\*/PKGBUILD,\*\*/.SRCINFO\}
fatal: pathspec '\{\*\*/PKGBUILD,\*\*/.SRCINFO\}' did not match any files

so the log message is actually getting a proper glob list, but it fails in the actual message.

It'd be great to get some documentation about what is legal glob syntax, and maybe another example of non-trivial globbing. In my case, I'm looking for the result of the bash glob pattern:

{**/PKGBUILD,**/.SRCINFO}

To Reproduce
Make a project in github called globtest

mkdir -p dummy/A dummy/B dummy/.github/workflows/
pushd dummy
touch A/x A/y B/x B/y
cat > .github/workflows/dummy.yml <<EOL
name: dummy
on: push
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Get version
        shell: bash
        run: echo 1 > A/x ; echo 2 > A/y ; echo 3 > B/x ; echo 4 > B/y
      - uses: stefanzweifel/[email protected]
        with:
            commit_message: Message
            file_pattern: \{\*\*/x,\*\*/y\}
EOL
git init && git add . && git commit -m "X"
git remote add origin [email protected]:stefanzweifel/globtest.git
git push -f origin master
touch me && git commit -a -m "foo" && git push

Expected behavior
All changed files to be committed.

I didn't try any of that blob of steps above, so YMMV. But you get the idea.