Update service_container/tags.rst

Co-Authored-By: XuruDragon <[email protected]>

Author: OskarStark

service_container/tags.rst

@@ -635,7 +635,7 @@ but we can now access a specific injected service:
             // inject all services tagged with app.handler as first argument
             ->addArgument(new TaggedIteratorArgument('app.handler', 'key'));
 
-After compilation the ``HandlerCollection`` service is able to iterate over your
+After compilation the ``HandlerCollection`` is able to iterate over your
 application handlers. But we want to retrieve a specific service by it's
 ``key`` attribute. As it's an iterator, we can use ``iterator_to_array``
 to get an array and then retrieve the ``handler_two`` handler :