feat(publisher-github): add retry support

[malept]

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

Add retry support as per https://octokit.github.io/rest.js/v18#automatic-retries

[codecov]

Codecov Report

Merging #2550 (8b62ec6) into master (e4a364d) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2550      +/-   ##
==========================================
+ Coverage   64.49%   64.52%   +0.02%     
==========================================
  Files          91       91              
  Lines        2642     2644       +2     
  Branches      584      584              
==========================================
+ Hits         1704     1706       +2     
  Misses        754      754              
  Partials      184      184              

Impacted Files	Coverage Δ
packages/publisher/github/src/util/github.ts	91.30% <100.00%> (+0.82%)	⬆️

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