fix(deps): update module golang.org/x/oauth2 to v0.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
golang.org/x/oauth2	v0.0.0-20220722155238-128564f6959c -> v0.21.0

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.28%. Comparing base (c3f1aae) to head (22c2b29).

❗ Current head 22c2b29 differs from pull request most recent head 6f356a5

Please upload reports for the commit 6f356a5 to get more accurate results.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #21   +/-   ##
=======================================
  Coverage   80.28%   80.28%           
=======================================
  Files          10       10           
  Lines         284      284           
=======================================
  Hits          228      228           
  Misses         45       45           
  Partials       11       11           

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