docs(python): Update social icons in API reference docs

[r-brink]

Twitter was rebranded to X in 2023, so I thought it would be time to replace the Twitter logo in our API reference docs.

[ritchie46]

Let's put the bluesky there as well.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.76%. Comparing base (af8d8d9) to head (1f61b48).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21214      +/-   ##
==========================================
- Coverage   79.78%   79.76%   -0.02%     
==========================================
  Files        1593     1594       +1     
  Lines      228097   228142      +45     
  Branches     2600     2600              
==========================================
- Hits       181982   181975       -7     
- Misses      45518    45570      +52     
  Partials      597      597              

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