Update rate limiting in config settings docs

Author: jasonblais

source/administration/config-settings.rst

@@ -1932,7 +1932,7 @@ Memory Store Size
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Maximum number of user sessions connected to the system as determined by **VaryByRemoteAddr** and **VaryByHeader** variables. 
 
-Typically set to the number of users in the system
+Typically set to the number of users in the system.
 
 +----------------------------------------------------------------------------------------------------------------------------------------------------------------------+
 | This feature's ``config.json`` setting is ``"MemoryStoreSize": 10000`` with whole number input.                                                                      |