feat: tagging the release also comments on the release PR

[chingor13]

Fixes #728

[codecov]

Codecov Report

Merging #751 (57fec65) into master (809f819) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #751      +/-   ##
==========================================
+ Coverage   89.22%   89.27%   +0.04%     
==========================================
  Files          57       57              
  Lines        7315     7348      +33     
  Branches      685      687       +2     
==========================================
+ Hits         6527     6560      +33     
  Misses        787      787              
  Partials        1        1              

Impacted Files	Coverage Δ
src/github-release.ts	97.32% <100.00%> (+0.08%)	⬆️
src/github.ts	86.62% <100.00%> (+0.25%)	⬆️

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