Fix variable name

Author: Potapy4

articles/storage/files/storage-how-to-use-files-linux.md

@@ -113,7 +113,7 @@ You can mount the same Azure file share to multiple mount points if desired.
         --resource-group $resourceGroupName \
         --name $storageAccountName \
         --query "primaryEndpoints.file" | tr -d '"')
-    smbPath=$(echo $httpEndpoint | cut -c7-$(expr length $httpEndpoint))$fileShare
+    smbPath=$(echo $httpEndpoint | cut -c7-$(expr length $httpEndpoint))$fileShareName
 
     storageAccountKey=$(az storage account keys list \
         --resource-group $resourceGroupName \