[Synapse] Updated help doc for [Set-AzSynapseLinkConnection] and [Set-AzSynapseLinkConnectionLinkTable] (Azure#19144)

* update help doc for set link connection cmdlets

* remove escaped back slash

Author: yanjungao718

src/Synapse/Synapse/help/Set-AzSynapseLinkConnection.md

@@ -31,15 +31,46 @@ The **Set-AzSynapseLinkConnection** cmdlet creates or updates a link connections
 
 ### Example 1
 ```powershell
-Set-AzSynapseLinkConnection -WorkspaceName ContosoWorkspace -DefinitionFile "C:\\samples\\linkconnection.json"
+<#
+linkconnection.json
+{
+	"name":"sampleLinkConnection", // please change to your link connection name
+	"properties":{
+		"sourceDatabase":{
+			"typeProperties":{ // please change to your source database resourceId and principalId
+				"resourceId":"/subscriptions/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/sampleResourceGroup/providers/Microsoft.Sql/servers/sampleServer",
+				"principalId":"xxxxxxxxxx"
+				},
+			"linkedService":{
+				"referenceName":"sampleLinkServiceReference", // please change to your source database link service name
+				"type":"LinkedServiceReference"
+			}
+		},
+		"targetDatabase":{
+			"linkedService":{
+				"referenceName":"sampleLinkServiceReference", // please change to your target database link service name
+				"type":"LinkedServiceReference",
+				"parameters":{
+					"DBName":"v2"
+				}
+			}
+		},
+		"compute":{
+			"coreCount":16,
+			"computeType":"General"
+		}
+	}
+}
+#>
+Set-AzSynapseLinkConnection -WorkspaceName ContosoWorkspace -DefinitionFile "C:\samples\linkconnection.json"
 ```
 
 This command creates or updates a link connection from definition file linkconnection.json in the workspace named ContosoWorkspace.
 
 ### Example 2
 ```powershell
 $ws = Get-AzSynapseWorkspace -Name ContosoWorkspace
-$ws | Set-AzSynapseLinkConnection -DefinitionFile "C:\\samples\\linkconnection.json"
+$ws | Set-AzSynapseLinkConnection -DefinitionFile "C:\samples\linkconnection.json"
 ```
 
 This command creates or updates a link connection from definition file linkconnection.json in the workspace named ContosoWorkspace through pipeline.

src/Synapse/Synapse/help/Set-AzSynapseLinkConnectionLinkTable.md

@@ -39,7 +39,30 @@ The **Set-AzSynapseLinkConnectionLinkTables** cmdlet edits link tables under a l
 
 ### Example 1
 ```powershell
-Set-AzSynapseLinkConnectionLinkTable -WorkspaceName ContosoWorkspace -LinkConnectionName ContosoLinkConnection -EditTablesRequestFile "C:\\samples\\edittables.json"
+<#
+edittables.json
+{ 
+  "linkTables": [ 
+    { 
+      "id": "00000000000000000000000000000000", // please change to your link table Id: a uuid
+      "source": { 
+        "tableName": "sampleSourceTable", // please change to your source table name
+        "schemaName": "sampleSourceSchema" // please change to your source database schema name
+      }, 
+      "target": { 
+        "tableName": "sampleTargetTable", // please change to your target table name
+        "schemaName": "sampleTargetSchema", // please change to your target database schema name
+        "distributionOptions": { 
+          "type": "Round_RoBin", // please choose a type from Hash, Round_RoBin, Replicate
+          "distributionColumn": "sampleColumn" // please change to the column name
+        }
+      }, 
+      "operationType": "add" // please choose a value from add, update, remove
+    }
+  ]
+}
+#>
+Set-AzSynapseLinkConnectionLinkTable -WorkspaceName ContosoWorkspace -LinkConnectionName ContosoLinkConnection -EditTablesRequestFile "C:\samples\edittables.json"
 ```
 
 This command edits link tables under link connection ContosoLinkConnection in workspace ContosoWorkspace.
@@ -49,7 +72,7 @@ This file includes information about edited link table.
 ### Example 2
 ```powershell
 $ws = Get-AzSynapseWorkspace -Name ContosoWorkspace
-$ws | Set-AzSynapseLinkConnectionLinkTable -LinkConnectionName ContosoLinkConnection -EditTablesRequestFile "C:\\samples\\edittables.json"
+$ws | Set-AzSynapseLinkConnectionLinkTable -LinkConnectionName ContosoLinkConnection -EditTablesRequestFile "C:\samples\edittables.json"
 ```
 
 This command edits link tables under link connection ContosoLinkConnection in workspace ContosoWorkspace through pipeline.
@@ -59,7 +82,7 @@ This file includes information about edited link table.
 ### Example 3
 ```powershell
 $lc = Get-AzSynapseLinkConnection -WorkspaceName ContosoWorkspace -Name ContosoLinkConnection
-$lc | Set-AzSynapseLinkConnectionLinkTable -EditTablesRequestFile "C:\\samples\\edittables.json"
+$lc | Set-AzSynapseLinkConnectionLinkTable -EditTablesRequestFile "C:\samples\edittables.json"
 ```
 
 This command edits link tables under a link connection through pipeline.