DOCSP-21677 replica set typo (#2805)

Author: ianf-mongodb

source/reference/method/rs.reconfigForPSASet.txt

@@ -157,7 +157,7 @@ A replica set named ``rs0`` has the following configuration:
          },
          {
             "_id" : 2,
-            "host" : "mongodb2.example.net:27017",
+            "host" : "mongodb1.example.net:27017",
             "arbiterOnly" : true,
             "buildIndexes" : true,
             "hidden" : false,
@@ -205,7 +205,7 @@ connected to the primary.
      },
      {
         "_id" : 1,
-        "host" : "mongodb2.example.net:27017",
+        "host" : "mongodb1.example.net:27017",
         "arbiterOnly" : false,
         "buildIndexes" : true,
         "hidden" : false,
@@ -265,7 +265,7 @@ connected to the primary.
             },
             {
                "_id" : 1,
-               "host" : "mongodb2.example.net:27017",
+               "host" : "mongodb1.example.net:27017",
                "arbiterOnly" : false,
                "buildIndexes" : true,
                "hidden" : false,