Add runtime

Author: simonkurtz-MSFT

samples/authX/create.ipynb

@@ -10,7 +10,7 @@
     "\n",
     "⚙️ **Supported infrastructures**: All infrastructures\n",
     "\n",
-    "⌚ **Expected *Run All* runtime (excl. infrastructure prerequisite): ~[NOTEBOOK RUNTIME] minute**\n",
+    "⌚ **Expected *Run All* runtime (excl. infrastructure prerequisite): ~2-3 minutes**\n",
     "\n",
     "## Objectives\n",
     "\n",