fix: exit hook retry loop on success

[plyr4]

fixes a regression introduced in #1175 where retryLimit - 1 duplicate hooks are created after success.

cc @jbrockopp

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 52.78%. Comparing base (6750763) to head (dcd5e3a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
api/webhook/post.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1179      +/-   ##
==========================================
- Coverage   52.79%   52.78%   -0.01%     
==========================================
  Files         551      551              
  Lines       19219    19220       +1     
==========================================
  Hits        10146    10146              
- Misses       8509     8510       +1     
  Partials      564      564              

Files with missing lines	Coverage Δ
api/webhook/post.go	0.00% <0.00%> (ø)

[KellyMerrick]

lgtm