Improve discoverability of Az Managed Application docs (#20498)

Co-authored-by: Mike F. Robbins <[email protected]>

Author: mikefrobbins

tools/CreateMappings_rules.json

@@ -407,6 +407,11 @@
     "group": "Resources",
     "alias": "Active Directory"
   },
+  {
+    "regex": "ManagedApplication",
+    "group": "Resources",
+    "alias": "Managed Applications"
+  },
   {
     "regex": "Resources",
     "group": "Resources",