Update readme.python.md (Azure#16115)

Author: msyyc

specification/azure-kusto/resource-manager/readme.python.md

@@ -8,7 +8,7 @@ azure-arm: true
 license-header: MICROSOFT_MIT_NO_VERSION
 package-name: azure-mgmt-kusto
 no-namespace-folders: true
-package-version: 1.0.0b1
+package-version: 2.0.0b1
 clear-output-folder: true
 ```