Always warn on bad commit messages instead of failing

danger/commit_messages/Dangerfile

@@ -127,7 +127,7 @@ def warn_or_fail_commits(failed_linters, default_to_fail: true)
   Array(failed_linters).each do |linter|
     linter.problems.each do |problem_key, problem_desc|
       case problem_key
-      when :subject_above_warning
+      when :subject_too_short, :subject_above_warning
         warn_commit(linter.commit, problem_desc)
       else
         self.__send__("#{level}_commit", linter.commit, problem_desc) # rubocop:disable GitlabSecurity/PublicSend