Fix typo of the CoreOnly directory files (#13328)

CoreOnly/Tests/FirebasePodTest/FirebasePodTest/SceneDelegate.swift

@@ -32,7 +32,7 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
     // Called as the scene is being released by the system.
     // This occurs shortly after the scene enters the background, or when its session is discarded.
     // Release any resources associated with this scene that can be re-created the next time the
-    // scene connects. The scene may re-connect later, as its session was not neccessarily
+    // scene connects. The scene may re-connect later, as its session was not necessarily
     // discarded (see `application:didDiscardSceneSessions` instead).
   }