DEV: allows $prometheus_client

DEV: allows $prometheus_client

diff --git a/.rubocop.yml b/.rubocop.yml
index 0ca7eff..9d48791 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1 +1,6 @@
 inherit_from: https://raw.githubusercontent.com/discourse/discourse/master/.rubocop.yml
+
+Style/GlobalVars:
+  AllowedVariables: [
+    $prometheus_client
+  ]

GitHub sha: f074726e