Use more precise language in comment

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Zerpet

.ci/ubuntu/one-node/21-enable-management-collector.conf

@@ -1,3 +1,3 @@
-# This file might be required to test with images built from main.
+# This file is required to test with images built from main.
 # Images in pivotalrabbitmq/rabbitmq disable the metrics collector by default.
 management_agent.disable_metrics_collector = false