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

[botty-mcbottington]

This PR contains the following updates:

Package	Change	Age	Confidence
golang.org/x/sync	v0.20.0 → v0.21.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.16%. Comparing base (74e0f03) to head (c91b98b).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #330   +/-   ##
=======================================
  Coverage   45.16%   45.16%           
=======================================
  Files          53       53           
  Lines        4886     4886           
=======================================
  Hits         2207     2207           
  Misses       2523     2523           
  Partials      156      156           

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