docs: update OpenAPI spec links

[apify-service-account]

• Updates the auto-generated Pydantic models and TypedDicts based on the proposed OpenAPI specification changes.
• Based on apify-docs PR #2702.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.54%. Comparing base (5bc2567) to head (efa70e1).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #905   +/-   ##
=======================================
  Coverage   94.54%   94.54%           
=======================================
  Files          48       48           
  Lines        5098     5098           
=======================================
  Hits         4820     4820           
  Misses        278      278           

Flag	Coverage Δ
integration	92.91% <100.00%> (-0.12%)	⬇️
unit	83.36% <100.00%> (ø)

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