Merge 0.11 docs with rcs

[flying-sheep]

This would be an idea. It’s pretty manual again and we wanted less manual process. IDK if we can automate this better.

https://scverse.zulipchat.com/#narrow/channel/315185-general/topic/AnnData.200.2E11.2E0/near/481456047

[ilan-gold]

Seems doable @flying-sheep but maybe not a huge priority since it only needs to be done on >minor releases. Maybe a python markdown parser + script that runs in the release job?

[Zethson]

I'm trying to figure out how other big projects seem to do it and if I see it right, they:

1. Have full release notes per RC -> RC 3 also has all changes of RC2 and RC1 and not just the diff between RCs
2. The final release has ALL changes and does not mention the RCs again.
3. If I see this right, packages like numpy, pandas or Pytorch only render non RC releases on their docs but announce the RC changelogs via Github releases.

This PR is fine with me but I just wanted to mention that for discussion.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.52%. Comparing base (c168e8d) to head (d7558b3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1752      +/-   ##
==========================================
- Coverage   86.99%   84.52%   -2.48%     
==========================================
  Files          40       40              
  Lines        6053     6053              
==========================================
- Hits         5266     5116     -150     
- Misses        787      937     +150     

see 8 files with indirect coverage changes