ci(workflow): update github action default token

[Sarthak-instill]

Because

• we need to update github action default token

This commit

• update github action default token

[linear]

INS-2412 For public repo's PR GA workflow, we don’t need to log in to our Docker Hub.

pinglin said:

engineering For our public repos’ pull request GA workflow, we don’t need to log in to our Docker Hub. The GA secret can’t be exposed to a forked repo anyway. Also, for Codecov GA workflow, we will need to use the GitHub default token here so the pull request from a forked repo branch can also trigger the Codecov GA workflow. sarthak.gupta Can you help update the logic for all repos. Thanks.

<https://github.com/instill-ai/model-backend/blob/main/.github/workflows/coverage.yml | coverage.yml>

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (961c654) 76.49% compared to head (479f29d) 76.49%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #19   +/-   ##
=======================================
  Coverage   76.49%   76.49%           
=======================================
  Files           1        1           
  Lines         217      217           
=======================================
  Hits          166      166           
  Misses         34       34           
  Partials       17       17           

Flag	Coverage Δ
unittests	76.49% <ø> (ø)

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