update a link

Author: mumian

articles/azure-resource-manager/bicep/deploy-what-if.md

@@ -127,7 +127,7 @@ For REST API, use:
 
 You can use the what-if operation through the Azure SDKs.
 
-- For Python, use [what-if](/python/api/azure-mgmt-resource/azure.mgmt.resource.resources.v2019_10_01.operations.deploymentsoperations#what-if-resource-group-name--deployment-name--properties--location-none--custom-headers-none--raw-false--polling-true----operation-config-).
+- For Python, use [what-if](/python/api/azure-mgmt-resource-deployments/azure.mgmt.resource.deployments.models.whatifchange).
 - For Java, use [DeploymentWhatIf Class](/java/api/com.azure.resourcemanager.resources.models.deploymentwhatif).
 - For .NET, use [DeploymentWhatIf Class](/dotnet/api/microsoft.azure.management.resourcemanager.models.deploymentwhatif).