DOCSP-15901 mongos typo (#2721)

* DOCSP-15901 changed second mongos

* DOCSP-15901 changed second mongos

Author: jocelyn-mendez1

source/core/sharded-cluster-components.txt

@@ -73,7 +73,7 @@ single client to reach the same ``mongos``. For shard-level high
 availability, a common pattern is to place ``mongos`` instances on the 
 same hardware that ``mongod`` instances are already running on.
 Another option is to embed ``mongos`` routers with
-application tier infrastructure.
+application tier infrastructure. 
 
 There is no limit to the number of :binary:`~bin.mongos` routers you can
 have in a deployment. However, as :binary:`~bin.mongos` routers