DOCSP-47022 Add link to replication manual (#519)

Author: stephmarie17

source/connect/connection-targets.txt

@@ -102,6 +102,9 @@ When connecting to a replica set, the driver takes the following actions by defa
    provide the full list of hosts to ensure connectivity when the specified host
    is unavailable.
 
+To learn more about replica sets, see the :manual:`Replication </replication>` 
+entry in the Server manual.
+
 .. _go-direct-connection-target:
 
 Direct Connection