Update labeler to default backports to 2.x

[ohltyler]

Signed-off-by: Tyler Ohlsen [email protected]

Description

Update labeler to default backports to 2.x branch.

Check List

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[codecov-commenter]

Codecov Report

Merging #246 (2f49216) into main (2964522) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #246   +/-   ##
=======================================
  Coverage   45.92%   45.92%           
=======================================
  Files         150      150           
  Lines        4956     4956           
  Branches      955      955           
=======================================
  Hits         2276     2276           
  Misses       2463     2463           
  Partials      217      217           

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