[Synapse] - Add x-nullable:true for folder property (#16237)

Co-authored-by: Dongwei Wang <[email protected]>

Author: idear1203

specification/synapse/data-plane/Microsoft.Synapse/preview/2021-06-01-preview/entityTypes/Notebook.json

@@ -46,6 +46,7 @@
         "folder": {
           "description": "The folder that this notebook is in. If not specified, this notebook will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this notebook is in.",

specification/synapse/data-plane/Microsoft.Synapse/preview/2021-06-01-preview/entityTypes/SparkJobDefinition.json

@@ -33,6 +33,7 @@
         "folder": {
           "description": "The folder that this Spark job definition is in. If not specified, this Spark job definition will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this Spark job definition is in.",

specification/synapse/data-plane/Microsoft.Synapse/preview/2021-06-01-preview/entityTypes/SqlScript.json

@@ -32,6 +32,7 @@
         "folder": {
           "description": "The folder that this SQL script is in. If not specified, this SQL script will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this SQL script is in.",

specification/synapse/data-plane/Microsoft.Synapse/stable/2020-12-01/entityTypes/Notebook.json

@@ -46,6 +46,7 @@
         "folder": {
           "description": "The folder that this notebook is in. If not specified, this notebook will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this notebook is in.",

specification/synapse/data-plane/Microsoft.Synapse/stable/2020-12-01/entityTypes/SparkJobDefinition.json

@@ -33,6 +33,7 @@
         "folder": {
           "description": "The folder that this Spark job definition is in. If not specified, this Spark job definition will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this Spark job definition is in.",

specification/synapse/data-plane/Microsoft.Synapse/stable/2020-12-01/entityTypes/SqlScript.json

@@ -32,6 +32,7 @@
         "folder": {
           "description": "The folder that this SQL script is in. If not specified, this SQL script will appear at the root level.",
           "type": "object",
+          "x-nullable": true,
           "properties": {
             "name": {
               "description": "The name of the folder that this SQL script is in.",