ci(docs): fetch all git history/tags/branches for MkDocs dates

[qin-yu]

This PR fixes #365

References:

• https://github.com/timvink/mkdocs-git-revision-date-localized-plugin?tab=readme-ov-file#note-when-using-build-systems-like-github-actions
• https://github.com/actions/checkout?tab=readme-ov-file#fetch-all-history-for-all-tags-and-branches

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.71%. Comparing base (63d75c8) to head (f7b74c6).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #366   +/-   ##
=======================================
  Coverage   64.71%   64.71%           
=======================================
  Files          71       71           
  Lines        5201     5201           
=======================================
  Hits         3366     3366           
  Misses       1835     1835           

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