Better note highlighting (#674)

Author: OskarStark

README.md

@@ -85,7 +85,8 @@ The version of your Symfony can be quite old. Public methods are stable from Sym
 
 ---
 
-Note: in this case, container cache PHP file located in `/var/cache/<env>/appProjectContainer.php` is not enough. Why? Few services require Kernel to be set, e.g. routes that are resolved in lazy way. This container file is only dumped without Kernel and [would crash with missing "kernel" error](https://github.com/symfony/symfony/issues/19840). That's why the rule needs full blown container.
+> [!NOTE]
+> In this case, container cache PHP file located in `/var/cache/<env>/appProjectContainer.php` is not enough. Why? Few services require Kernel to be set, e.g. routes that are resolved in lazy way. This container file is only dumped without Kernel and [would crash with missing "kernel" error](https://github.com/symfony/symfony/issues/19840). That's why the rule needs full blown container.
 
 <br>