feat: make commit msg configurable

[msiebeneicher]

Description

Close #236

This PR enables you to change the commit message in the created pull request

[AndreasAugustin]

Hi @msiebeneicher thank you very much for you PR.
All fine, just would be nice if you could add a check at script start if the variable is set, e.q.

if [[ -z "${PR_COMMIT_MSG}" ]]; then
  echo "::error::Missing env variable 'PR_COMMIT_MSG'" >&2;
  exit 1;
fi

just to make sure that it fails soon enough if the message is missing.

[msiebeneicher]

Hi @msiebeneicher thank you very much for you PR. All fine, just would be nice if you could add a check at script start if the variable is set, e.q.

if [[ -z "${PR_COMMIT_MSG}" ]]; then
  echo "::error::Missing env variable 'PR_COMMIT_MSG'" >&2;
  exit 1;
fi

just to make sure that it fails soon enough if the message is missing.

Added the check :)

[AndreasAugustin]

🚀 thanks a lot!

[AndreasAugustin]

@all-contributors please add @msiebeneicher for code

[allcontributors]

@AndreasAugustin

I've put up a pull request to add @msiebeneicher! 🎉