Update cluster membership implementation doc

Author: ReubenBond

.openpublishing.redirection.orleans.json

@@ -39,6 +39,11 @@
         {
             "source_path_from_root": "/docs/orleans/host/configuration-guide/activation-garbage-collection.md",
             "redirect_url": "/dotnet/orleans/host/configuration-guide/activation-collection"
+        },
+        {
+            "source_path_from_root": "/docs/orleans/implementation/cluster-configuration.md",
+            "redirect_url": "/dotnet/orleans/implementation/cluster-membership"
         }
+
     ]
 }