gerrit-verifier: Fix regular expression to detect .bzl file changes

The pattern matches on "bzl" in any part of the filename, which can
result in incorrectly running buildifier on non-bzl files.

Change the pattern to only match on .bzl at the end of the filename.

Change-Id: I3f543a389f1ecf987435f45bc460a0a1f64566ef
1 file changed
tree: 82a136638406ebe0c4906f5f86be496c6abcba98
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore