message: [docs] make `yarn dev` usage clearer
diff: @@ -25,7 +25,12 @@ Make sure all the tests pass before making changes.
  ### Running Vercel CLI Changes
  -You can use `yarn dev <cli-commands...>` to invoke Vercel CLI with local changes.
  +You can use `yarn dev` from the `cli` package to invoke Vercel CLI with local changes:
  +
  +```
  +cd ./packages/cli
  +yarn dev <cli-commands...>
  +```
  See [CLI Local Development](../packages/cli#local-development) for more details.
  