docs: Fix broken requests documentation links

[mjsqu]

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📚 Documentation preview 📚: https://meltano-sdk--2111.org.readthedocs.build/en/2111/

[mjsqu]

As described, prior to this change all docstrings pointing to requests.readthedocs.io pages were broken due to a reshuffling of the requests package documentation

[codspeed-hq]

CodSpeed Performance Report

Merging #2111 will not alter performance

_{Comparing mjsqu:docs/broken_links_in_requests_readthedocs_docstrings (7d8cf34) with main (544f61f)}

Summary

✅ 6 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (544f61f) 87.76% compared to head (7d8cf34) 87.76%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2111   +/-   ##
=======================================
  Coverage   87.76%   87.76%           
=======================================
  Files          60       60           
  Lines        4946     4946           
  Branches     1007     1007           
=======================================
  Hits         4341     4341           
  Misses        424      424           
  Partials      181      181           

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[edgarrmondragon]

Thanks @mjsqu!