Update service_container/tags.rst

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

Author: OskarStark

service_container/tags.rst

@@ -661,7 +661,7 @@ to get an array and then retrieve the ``handler_two`` handler :
     You can omit the ``index_attribute_name`` attribute, by implementing a static
     method ``getDefaultIndexAttributeName`` to the handler.
 
-    Based on the previous example ``App\Handler\One`` should look like :
+    Based on the previous example ``App\Handler\One`` should look like this:
 
     .. code-block:: php