Fix LLaMA demo project.pbxproj (#12632)

Author: shoumikhin

examples/demo-apps/apple_ios/LLaMA/LLaMA.xcodeproj/project.pbxproj

@@ -359,7 +359,7 @@
 				03D151D62E0E9E43007A38BE /* ExecuTorchLLM */,
 			);
 			name = apple;
-			path = ../../../../../../../../executorch/extension/llm/apple;
+			path = ../../../../../../extension/llm/apple;
 			sourceTree = "<group>";
 		};
 		F292B0842D88B0D200BE6839 /* tokenizers */ = {