Update readme.python.md (#15449)

* Update readme.python.md

* Create readme.python.md

Author: BigCat20196

specification/datadog/resource-manager/readme.python.md

@@ -12,6 +12,8 @@ azure-arm: true
 license-header: MICROSOFT_MIT_NO_VERSION
 package-name: azure-mgmt-datadog
 no-namespace-folders: true
+package-version: 1.0.0b1
+clear-output-folder: true
 ```
 
 ``` yaml $(python) && $(python-mode) == 'update' && $(track2)