Corrected regex

Author: Microsoft Graph DevX Tooling

src/Sites/Sites.md

@@ -26,7 +26,7 @@ directive:
     remove: true
   - where:
       verb: Update
-      subject: ^GroupSiteOnenoteNotebookSectionGroupSectionPage|^GroupSiteOnenoteNotebookSectionPage$
+      subject: ^GroupSiteOnenoteNotebookSectionGroupSectionPage$|^GroupSiteOnenoteNotebookSectionPage$
     remove: true
   - where:
       verb: Get