Chore: replace deprecated command with environment file

[jongwooo]

Description of your changes

Closes #894

Update .github/workflows/release.yml 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

echo ::set-output name=VERSION::${VERSION}

TO-BE

echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run yarn lint to ensure the frontend changes are ready for review.
• Run make reviewableto ensure the server changes are ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

Special notes for your reviewer

None

[codecov]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (2ab672c) 59.01% compared to head (82c3583) 32.59%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
pkg/server/interfaces/api/application.go	0.00%	2 Missing ⚠️
pkg/server/interfaces/api/plugin.go	0.00%	1 Missing ⚠️
pkg/server/interfaces/api/repository.go	0.00%	1 Missing ⚠️
pkg/server/interfaces/api/target.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #895       +/-   ##
===========================================
- Coverage   59.01%   32.59%   -26.43%     
===========================================
  Files         116       91       -25     
  Lines       19846    17940     -1906     
===========================================
- Hits        11713     5848     -5865     
- Misses       6696    11212     +4516     
+ Partials     1437      880      -557     

Flag	Coverage Δ
apiserver-unittests	32.59% <0.00%> (-0.03%)	⬇️
server-e2e-tests	?

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