Change backport action

[SchrodingersGat]

• Change to korthout/backport-action
• More actively maintained
• Ref: Backport workflow failing #7042

[netlify]

✅ Deploy Preview for inventree-web-pui-preview canceled.

Name	Link
🔨 Latest commit	8fbb961
🔍 Latest deploy log	https://app.netlify.com/sites/inventree-web-pui-preview/deploys/661de86c777535000872cf42

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.29%. Comparing base (5fb343f) to head (8fbb961).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7046      +/-   ##
==========================================
- Coverage   83.31%   83.29%   -0.02%     
==========================================
  Files        1038     1038              
  Lines       45486    45486              
  Branches     1243     1243              
==========================================
- Hits        37896    37889       -7     
- Misses       7335     7352      +17     
+ Partials      255      245      -10     

Flag	Coverage Δ
backend	85.43% <ø> (+<0.01%)	⬆️
migrations	42.60% <ø> (+0.04%)	⬆️
pui	57.21% <ø> (-0.14%)	⬇️

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