Minor: dropping deprecated functions for future support

[jaku-jaku]

Current Script Warnings:

Warning

[Sync docs]
The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Warning

[Sync docs]
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/

Fixes:

• checkout v3 instead of v2
• update ::set-output to the latest version

[welcome]

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