chore(deps): update golang docker tag to v1.21 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
golang	stage	minor	1.20 -> 1.21
golang	final	minor	1.20-alpine -> 1.21-alpine

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

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• If you want to rebase/retry this PR, check this box

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[codecov-commenter]

Codecov Report

Merging #1270 (a56935f) into master (4413343) will increase coverage by 0.00%.
The diff coverage is n/a.

❗ Current head a56935f differs from pull request most recent head 99c1d88. Consider uploading reports for the commit 99c1d88 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1270   +/-   ##
=======================================
  Coverage   88.52%   88.52%           
=======================================
  Files          73       73           
  Lines        7102     7069   -33     
=======================================
- Hits         6287     6258   -29     
+ Misses        479      477    -2     
+ Partials      336      334    -2