fix zulip bridge service name on removal

roles/custom/matrix-bridge-zulip/tasks/setup_uninstall.yml

@@ -15,7 +15,7 @@
   block:
     - name: Ensure matrix-bridge-zulip is stopped
       ansible.builtin.service:
-        name: matrix-bridge-zulip
+        name: matrix-zulip-bridge
         state: stopped
         enabled: false
         daemon_reload: true