message: update package name and output folder in readme.typescript.md
diff: @@ -6,8 +6,8 @@ Please also specify `--typescript-sdks-folder=<path to root folder of your azure
  ```yaml $(typescript)
  typescript:
  azure-arm: true
  - package-name: "support"
  - output-folder: "$(typescript-sdks-folder)/packages/support"
  + package-name: "@azure/arm-support"
  + output-folder: "$(typescript-sdks-folder)/sdk/support/arm-support"
  payload-flattening-threshold: 1
  generate-metadata: true
  ```
  \ No newline at end of file
  