message: chore: improve deprecation message for serve command
diff: @@ -14,7 +14,7 @@ The two following commands are available:
  - `redoc-cli serve [spec]` - starts the server with `spec` rendered with ReDoc.
  Supports a server-side rendering mode (`--ssr`)
  and can watch the spec (`--watch`) to automatically reload the page whenever it changes.\
  - Deprecated. Use `npx @redocly/openapi-cli preview-docs [spec]`
  + Deprecated. Use `npx @redocly/cli preview-docs [spec]`
  - `redoc-cli bundle [spec]` - bundles `spec` and Redoc into a **zero-dependency** HTML file.\
  Deprecated. Use Use "build" command instead.
  - `redoc-cli build [spec]` - build `spec` and Redoc into a **zero-dependency** HTML file.
  