Chore: replace deprecated command with environment file

[jongwooo]

Description

Closes #384

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

- name: Get matrix
  id: get_matrix
  run: |
    TARGETS=${{matrix.TARGETS}}
    echo ::set-output name=OS::${TARGETS%/*}
    echo ::set-output name=ARCH::${TARGETS#*/}

TO-BE

- name: Get matrix
  id: get_matri
  shell: bash
  run: |
    TARGETS=${{matrix.TARGETS}}
    echo "OS=${TARGETS%/*}" >> $GITHUB_OUTPUT
    echo "ARCH=${TARGETS#*/}" >> $GITHUB_OUTPUT

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (3a96f68) 79.31% compared to head (324f3e3) 0.00%.
Report is 21 commits behind head on master.

Files	Patch %	Lines
e2e/normal/regression.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #385       +/-   ##
==========================================
- Coverage   79.31%   0.00%   -79.32%     
==========================================
  Files          23       1       -22     
  Lines        1750      71     -1679     
==========================================
- Hits         1388       0     -1388     
+ Misses        278      71      -207     
+ Partials       84       0       -84     

Flag	Coverage Δ
e2e	0.00% <0.00%> (∅)
unit	?

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