Fixing documentation error in Synapse sample notebook (#1014)

* Removing double quotes

* Commenting out

* Bringing maven jar back

* Adding double quotes

* Reverting changes

* Fixing the wrong variable reference in the sample notebook

docs/samples/azure_synapse/product_recommendation_demo.ipynb

@@ -57,8 +57,8 @@
         "    objectId=$(az ad signed-in-user show --query id -o tsv)\n",
         "    az keyvault update --name $keyvault_name --enable-rbac-authorization false\n",
         "    az keyvault set-policy -n $keyvault_name --secret-permissions get list --object-id $objectId\n",
-        "    az role assignment create --assignee $userId --role \"Storage Blob Data Contributor\"\n",
-        "    az synapse role assignment create --workspace-name $synapse_workspace_name --role \"Synapse Contributor\" --assignee $userId\n",
+        "    az role assignment create --assignee $objectId --role \"Storage Blob Data Contributor\"\n",
+        "    az synapse role assignment create --workspace-name $synapse_workspace_name --role \"Synapse Contributor\" --assignee $objectId\n",
         "```\n"
       ]
     },