never block pull_request_target labeling event

[fuxingloh]

What kind of PR is this?:

/kind fix

What this PR does / why we need it:

never block pull_request_target labeling event

[codecov]

Codecov Report

Merging #82 (86308cf) into main (0273252) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #82   +/-   ##
=======================================
  Coverage   98.09%   98.09%           
=======================================
  Files          14       14           
  Lines         472      472           
  Branches      133      133           
=======================================
  Hits          463      463           
  Misses          5        5           
  Partials        4        4           

Impacted Files	Coverage Δ
src/rules/ignore.ts	95.52% <100.00%> (ø)

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