Fix import statement for Output in quickstart notebook

Author: Gnanasundaramsampath-sys

tutorials/get-started-notebooks/quickstart.ipynb

@@ -355,7 +355,7 @@
    "source": [
     "from azure.ai.ml import command\n",
     "from azure.ai.ml import Input\n",
-    "from azure.ai.ml import output\n",
+    "from azure.ai.ml import Output\n",
     "\n",
     "registered_model_name = \"credit_defaults_model\"\n",
     "\n",