Update service_container/tags.rst

Co-Authored-By: XuruDragon <xurudragon@gmail.com>

Author: OskarStark

service_container/tags.rst

@@ -569,7 +569,7 @@ application handlers.
 Tagged Services Collection with Index
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-What if you want to retrieve a specific service within the injected collection previously?
+If you want to retrieve a specific service within the injected collection
 The solution is to use the ``index_by`` and ``default_index_method`` options of the argument
 in combination with ``!tagged``.