ci: Use GITHUB_OUTPUT envvar instead of set-output command

[arunsathiya]

save-state and set-output commands used in GitHub Actions are deprecated and GitHub recommends using environment files.

This PR updates the usage of set-output to $GITHUB_OUTPUT

Instructions for envvar usage from GitHub docs:

https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter

[CLAassistant]

All committers have signed the CLA.

[the-label-bot[bot]]

The Label Bot has predicted the following:

Category	Value	Confidence	Applied Label
Kind	feature	0.661	:heavy_check_mark:
Size	XS	0.997	:heavy_check_mark:

[dongjiang1989]

@arunsathiya Please fix DCO ref: https://github.com/kubeservice-stack/custom-limit-range/pull/2/checks?check_run_id=20752728359