When pushing commit that fixes lint errors, only include known files

[melink14]

Setting output now causes a GITHUB_FILE env file to be created which is commited even when linting does not produce any changes.

We should either whitelist the files we want to try to add or at least exclude known spurious files like this one.

[melink14]

This turned out to be a typo in how we were setting output and once that was fixed there were no spurious files anymore.