Update service_container/tags.rst

Co-Authored-By: Oskar Stark <oskarstark@googlemail.com>

Author: alexandrunastase

service_container/tags.rst

@@ -607,7 +607,9 @@ The tagged services can be prioritized using the ``priority`` attribute:
         $container->register(App\Handler\One::class)
             ->addTag('app.handler', ['priority' => 20]);
 
-Note that any other custom attributes will be ignored by this feature.
+.. note::
+
+    Note that any other custom attribute will be ignored by this feature.
 
 
 Another option, which is particularly useful when using autoconfiguring tags, is to implement the ``getDefaultPriority`` static method on a collected class::