update plugin metadata service ID in tests

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/backend-app-api/src/wiring/createSpecializedBackend.test.ts

@@ -57,6 +57,6 @@ describe('createSpecializedBackend', () => {
           }),
         ],
       }),
-    ).toThrow('The core.plugin-metadata service cannot be overridden');
+    ).toThrow('The core.pluginMetadata service cannot be overridden');
   });
 });

packages/backend-defaults/src/CreateBackend.test.ts

@@ -67,6 +67,6 @@ describe('createBackend', () => {
           }),
         ],
       }),
-    ).toThrow('The core.plugin-metadata service cannot be overridden');
+    ).toThrow('The core.pluginMetadata service cannot be overridden');
   });
 });