chore(deps): update alpine docker tag to v3.21.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
alpine	container	minor	3.20.3 -> 3.21.0
alpine	docker	minor	3.20.3 -> 3.21.0

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.78%. Comparing base (a6633a1) to head (62e73c1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1796   +/-   ##
=======================================
  Coverage   92.78%   92.78%           
=======================================
  Files          36       36           
  Lines        1358     1358           
  Branches      273      273           
=======================================
  Hits         1260     1260           
  Misses         68       68           
  Partials       30       30           

Flag	Coverage Δ
aarch64	92.56% <ø> (ø)
aarch64-without-git	92.56% <ø> (ø)
alpine	92.78% <ø> (ø)
alpine-proxy	92.56% <ø> (ø)
alpine-without-git	92.78% <ø> (ø)
linux	92.56% <ø> (ø)
linux-without-git	92.56% <ø> (ø)
macos	92.56% <ø> (ø)
macos-arm64	92.56% <ø> (ø)
macos-arm64-without-git	92.56% <ø> (ø)
macos-without-git	92.56% <ø> (ø)
macos-x64	92.56% <ø> (ø)
macos-x64-without-git	92.56% <ø> (ø)
windows	92.56% <ø> (ø)
windows-without-git	92.56% <ø> (ø)

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