DOCSP-48760 Add replica set note for older versions (#1136)

(cherry picked from commit 084c17d)

Author: stephmarie17

source/connect/connect.txt

@@ -148,6 +148,10 @@ When making a connection, the driver takes the following actions by default:
    To ensure connectivity if one host is unavailable, provide the full
    list of hosts when connecting to a replica set.
 
+.. note:: Replica Set in Docker
+
+   .. sharedinclude:: dbx/docker-replica-set.rst
+
 Direct Connection
 ^^^^^^^^^^^^^^^^^