Update coverage.yml

[fxamacker]

Bump codecov-action to 3.1.1 Bump go to 1.19. Remove obsolete comments.

---

• [x] Targeted PR against main branch
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [x] Code follows the standards mentioned here
• [x] Updated relevant documentation
• [x] Re-reviewed Files changed in the Github PR explorer
• [x] Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #276 (1717d1d) into main (4669a11) will increase coverage by 0.02%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #276      +/-   ##
==========================================
+ Coverage   68.99%   69.02%   +0.02%     
==========================================
  Files          14       14              
  Lines        7306     7306              
==========================================
+ Hits         5041     5043       +2     
+ Misses       1631     1629       -2     
  Partials      634      634              

Impacted Files	Coverage Δ
storage.go	79.13% <0.00%> (+0.34%)	:arrow_up:

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[fxamacker]

This was left open too long and made mostly redundant by dependabot changes that got merged.