message: fix readme syntax error
diff: @@ -86,6 +86,7 @@ These settings apply only when `--tag=package-2020-01-01` is specified on the co
  input-file:
  - Microsoft.DBforMariaDB/stable/2018-06-01/mariadb.json
  - Microsoft.DBforMariaDB/stable/2020-01-01/ServerSecurityAlertPolicies.json
  +```
  ---
  # Code Generation
  