authz: Address Thorsten's post-merge feedback on #4442

Created by: tsenart

This PR addresses @mrnugget's post-merge feedback on #4442.

Created by: codecov[bot]

Codecov Report

Merging #4492 into master will increase coverage by <.01%. The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #4492      +/-   ##
==========================================
+ Coverage   47.22%   47.23%   +<.01%     
==========================================
  Files         720      720              
  Lines       43564    43565       +1     
  Branches     1762     1762              
==========================================
+ Hits        20575    20576       +1     
  Misses      21030    21030              
  Partials     1959     1959

Impacted Files	Coverage Δ
...d/frontend/internal/authz/authz_bitbucketserver.go	79.41% <66.66%> (+0.62%)