Update readme.python.md (Azure#23381)

Author: msyyc

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

@@ -8,6 +8,7 @@ license-header: MICROSOFT_MIT_NO_VERSION
 package-name: azure-mgmt-compute
 no-namespace-folders: true
 package-version: 1.0.0b1
+only-path-and-body-params-positional: true
 modelerfour:
   lenient-model-deduplication: true