chore(api-docs): Document group_tagkey_details.py

[MichaelSun48]

No description provided.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

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[codecov]

Codecov Report

Attention: Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...rc/sentry/api/serializers/models/tagkey_details.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #79467       +/-   ##
===========================================
+ Coverage   52.30%   78.34%   +26.03%     
===========================================
  Files        7106     7134       +28     
  Lines      313858   315228     +1370     
  Branches    51317    51518      +201     
===========================================
+ Hits       164167   246951    +82784     
+ Misses     148076    61806    -86270     
- Partials     1615     6471     +4856