Replace deprecated command with environment file

[jongwooo]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Update .github/workflows/release.yaml to use environment file instead of deprecated set-output command.
For more information, see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

I found the workflow file that use set-output command through the following command:

$ find . -name '*.yml' -o -name '*.yaml' | xargs egrep '\bset-output\b'

AS-IS

run: echo ::set-output name=VERSION::${GITHUB_REF#refs/tags/}

TO-BE

run: echo "VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT

Which issue(s) this PR fixes:

Fixes #2014

Special notes for reviewers:

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.:

[pixiake]

@jongwooo Thanks for this contribution !
/lgtm
/approve

[ks-ci-bot]

LGTM label has been added.

Git tree hash: ec80fbcfabf488e850402feebe6ec1bb2b8aed24

[ks-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jongwooo, pixiake

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