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Warning from the `set-output` command when running Actions

Description:
When I set up my python environment in Actions, it reveals a warning:

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/

This is my code:

- name: Set up Python 3.10
      uses: actions/setup-python@v3
      with:
        python-version: "3.10"

Action version:
Not sure, the newest

Platform:

  • Ubuntu
  • macOS
  • Windows

Runner type: Not sure

  • Hosted
  • Self-hosted

Tools version:
Current: python 3.10
I also test 3.11 and the warning is the same.

Repro steps:
Just run the code in Actions:

- name: Set up Python 3.10
      uses: actions/setup-python@v3
      with:
        python-version: "3.10"

Expected behavior:

Run actions/setup-python@v3
Successfully setup CPython (3.10.9)

Actual behavior:

Run actions/setup-python@v3
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/
Successfully setup CPython (3.10.9)