feat: import changelog from github

[Jcahilltorre]

Proposed changes

Adds the imported changelog from GitHub into the docs.nginx.com site docs.

Next steps:

Remove the existing redirect from that section of the docs to GitHub.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (82c7a23) 66.12% compared to head (f6c872f) 66.14%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #570      +/-   ##
==========================================
+ Coverage   66.12%   66.14%   +0.02%     
==========================================
  Files         118      118              
  Lines       13461    13461              
==========================================
+ Hits         8901     8904       +3     
+ Misses       3959     3956       -3     
  Partials      601      601              

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