Remove quotes around filesystem locations

[stevetaggart]

Removing these quotes allowed my flyway migrations which contained two different folders to run on a linux runner.

Before this change flyway produced an error saying the migration locations weren't found and the migrations didn't run successfully.

Summary of PR changes

PR Requirements

• For major, minor, or breaking changes, at least one of the commit messages contains the appropriate +semver: keywords.
  • See the Incrementing the Version section of the repository's README.md for more details.
• The action code does not contain sensitive information.

NOTE: If the repo's workflow could not automatically update the README.md, it should be updated manually with the next version. For javascript actions, if the repo's workflow could not automatically recompile the action it should also be updated manually as part of the PR.

[JosephDSchwartz]

@stevetaggart do you have links to the failed/successful runs before and after this change? And did we double check the action still works on windows runners as well as linux?

[danielle-casella-adams]

Closing after checking with @stevetaggart. Please feel free to open this back up if you come across the issue again in the future.