Prepare changelog for v0.51 release

[pinosu]

• TODO: set release date

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.87%. Comparing base (f71e3bd) to head (8502258).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1849      +/-   ##
==========================================
- Coverage   54.89%   54.87%   -0.03%     
==========================================
  Files          64       64              
  Lines        9770     9770              
==========================================
- Hits         5363     5361       -2     
- Misses       3863     3864       +1     
- Partials      544      545       +1     

see 1 file with indirect coverage changes