message: Clarify prettier ci-fix instructions
diff: @@ -17,11 +17,11 @@ npm install
  npm run prettier-fix
  ```
  -Or if you want to fix specified service:
  +Or if you want to fix specified service, use the complete path, not relative:
  ```
  npm install
  -npm run prettier -- --write "specification/<service>/**/*.json"
  +npm run prettier -- --write "<path to repo>/azure-rest-api-specs/specification/**/*.json"
  ```
  Then please commit and push changes made by prettier.
  