Updates auto release notes workflow to fetch notes from main

[DarshitChanpura]

Description

Before this change release notes workflow required release notes to be present in tag, with this change release notes will not need to be backported. They can be but will not need to be.

Check List

- [ ] New functionality includes testing
- [ ] New functionality has been documented

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[codecov]

Codecov Report

Merging #3522 (60693ea) into main (c5f8c83) will decrease coverage by 0.40%.
Report is 3 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #3522      +/-   ##
============================================
- Coverage     64.71%   64.32%   -0.40%     
+ Complexity     3617     3592      -25     
============================================
  Files           281      281              
  Lines         20570    20570              
  Branches       3400     3400              
============================================
- Hits          13312    13231      -81     
- Misses         5557     5635      +78     
- Partials       1701     1704       +3     

see 8 files with indirect coverage changes

[peternied]

For our very manual process I think this will grab the best version of the release notes, thanks DC!