Update UnpinnedActionsTag query metadata scope

Agent-Logs-Url: https://github.com/github/codeql/sessions/5425ff86-b998-4c7b-9447-52c8ae74a7a2

Co-authored-by: oscarsj <1410188+oscarsj@users.noreply.github.com>

Author: Copilot

actions/ql/src/Security/CWE-829/UnpinnedActionsTag.ql

@@ -1,5 +1,5 @@
 /**
- * @name Unpinned tag for a non-immutable Action in workflow
+ * @name Unpinned tag for a non-immutable Action in workflow or composite action
  * @description Using a tag for a non-immutable Action that is not pinned to a commit can lead to executing an untrusted Action through a supply chain attack.
  * @kind problem
  * @security-severity 5.0