Bump recoveryservicesbackup Node.js package version to 3.0.0 (#3435)

Author: Dan Schulte

specification/recoveryservicesbackup/resource-manager/readme.nodejs.md

@@ -7,7 +7,7 @@ Please also specify `--node-sdks-folder=<path to root folder of your azure-sdk-f
 nodejs:
   azure-arm: true
   package-name: azure-arm-recoveryservicesbackup
-  package-version: 2.0.1-preview
+  package-version: 3.0.0
   output-folder: $(node-sdks-folder)/lib/services/recoveryServicesBackupManagement
   generate-license-txt: true
   generate-package-json: true