Deprecation warning

[Nurgak]

Describe the problem

When using the action the following warning appears:

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/

There are some mentions of set-output in this action that should probably be taken care of.

To reproduce

Use the action, check the output warnings.

Expected behavior

No warnings appear during action execution.

'arduino/compile-sketches' version

1.0.1

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest version
• My report contains all necessary details

[MathewHDYT]

@per1234 Would be nice if this could be merged, if this isn't done than according to this blog post by GitHub actions using the set-output or set-state, will simply fail starting 1st June 2023.