Add dependent repos for AZ SignalR and WebPubSub

Author: grminch

.openpublishing.publish.config.json

@@ -842,6 +842,18 @@
       "url": "https://github.com/Azure-Samples/msdocs-flask-postgresql-sample-app",
       "branch": "main",
       "branch_mapping": {}
+    },
+    {
+      "path_to_root": "azure-signalr-samples",
+      "url": "https://github.com/aspnet/AzureSignalR-samples",
+      "branch": "main",
+      "branch_mapping": {}
+    },
+    {
+      "path_to_root": "azure-webpubsub-samples",
+      "url": "https://github.com/Azure/azure-webpubsub",
+      "branch": "main",
+      "branch_mapping": {}
     }
   ],
   "branch_target_mapping": {