Fix release notes formatting and tox -e release warning

[zaneselvans]

No description provided.

[codecov]

Codecov Report

Merging #1346 (90fc378) into main (5404710) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1346      +/-   ##
==========================================
+ Coverage   83.30%   83.32%   +0.01%     
==========================================
  Files          62       62              
  Lines        6737     6737              
==========================================
+ Hits         5612     5613       +1     
+ Misses       1125     1124       -1     

Impacted Files	Coverage Δ
src/pudl/analysis/timeseries_cleaning.py	88.84% <0.00%> (+0.22%)	⬆️

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