Update docker.io/library/golang Docker tag to v1.20

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
docker.io/library/golang	final	minor	1.18-bullseye -> 1.20-bullseye

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[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.01 🎉

Comparison is base (8a11cf2) 76.37% compared to head (9ae4404) 76.39%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #525      +/-   ##
==========================================
+ Coverage   76.37%   76.39%   +0.01%     
==========================================
  Files          95       95              
  Lines        5672     5672              
==========================================
+ Hits         4332     4333       +1     
+ Misses        999      998       -1     
  Partials      341      341              

Flag	Coverage Δ
go	76.41% <ø> (+0.01%)	⬆️
wasm	66.44% <ø> (ø)

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see 1 file with indirect coverage changes

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