SqlFluff action causes Deprecation Warning on GitHub

[rbrooks]

This loc: https://github.com/yu-iskw/action-sqlfluff/blob/main/entrypoint.sh#L24

Throws:

Running sqlfluff 🐶 ...
  ==== finding fixable violations ====
    [1 templating/parsing errors found]
  ==== no fixable linting violations found ====
  All Finished!
  Warning: The `set-output` command is deprecated and will be disabled soon.
  Please upgrade to using Environment Files. For more information see:
  https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Thank you.

[yu-iskw]

@rbrooks This was already fixed. Please make sure the newer version of the action.
#53