Group CodeQL Dependabot updates

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: b6ceb930-bece-4da4-b457-7b142c3a322b

Author: williammartin

.github/dependabot.yml

@@ -16,3 +16,7 @@ updates:
       interval: "daily"
   cooldown:
     default-days: 3
+  groups:
+    codeql-actions:
+      patterns:
+        - "github/codeql-action/*"