chore: correct @antfu/ni package name in contributing guide (#9892) [ci skip]

Author: rotu

.github/contributing.md

@@ -63,7 +63,7 @@ Hi! I'm really excited that you are interested in contributing to Vue.js. Before
 
 You will need [Node.js](https://nodejs.org) **version 18.12+**, and [PNPM](https://pnpm.io) **version 8+**.
 
-We also recommend installing [ni](https://github.com/antfu/ni) to help switching between repos using different package managers. `ni` also provides the handy `nr` command which running npm scripts easier.
+We also recommend installing [@antfu/ni](https://github.com/antfu/ni) to help switching between repos using different package managers. `ni` also provides the handy `nr` command which running npm scripts easier.
 
 After cloning the repo, run:
 
@@ -90,7 +90,7 @@ The project uses [simple-git-hooks](https://github.com/toplenboren/simple-git-ho
 
 ## Scripts
 
-**The examples below will be using the `nr` command from the [ni](https://github.com/antfu/ni) package.** You can also use plain `npm run`, but you will need to pass all additional arguments after the command after an extra `--`. For example, `nr build runtime --all` is equivalent to `npm run build -- runtime --all`.
+**The examples below will be using the `nr` command from the [@antfu/ni](https://github.com/antfu/ni) package.** You can also use plain `npm run`, but you will need to pass all additional arguments after the command after an extra `--`. For example, `nr build runtime --all` is equivalent to `npm run build -- runtime --all`.
 
 The `run-s` and `run-p` commands found in some scripts are from [npm-run-all](https://github.com/mysticatea/npm-run-all) for orchestrating multiple scripts. `run-s` means "run in sequence" while `run-p` means "run in parallel".