updated README.md

README.md

@@ -98,7 +98,7 @@ The new directory contains:
 
 In your new project directory (`~/src/MyApp/`), edit these two files before your first build:
 
-> ⚠️ **Important Notice:**  
+> [!IMPORTANT] 
 > Do **not modify** the root `CMakeLists.txt` file in your project.  
 > All changes, targets, and configurations must be made in **`project.cmake`** only.  
 > The top-level `CMakeLists.txt` is managed by cpp-build-system and is required for