Only check files that have changed

[bgolding355]

Currently, the action is checking all files. For large repos, this is very slow. The action should only be checking files that have changed. There is this an existing GitHub acton which gets a list of changed files, try to see if you can use this

While the default behavior will be to only check the files that have changed, I will add a flag to turn this off.

[ferrarijefferson]

That would indeed be a very useful function to have, so I could use fewer steps for the pipeline. But in the meantime, I'm using this tool to do that
https://github.com/marketplace/actions/paths-changes-filter