chore(docs): update the minimum requeird version of node and pnpm (#11443) [ci skip]

Author: wzc520pyfm

.github/contributing.md

@@ -82,7 +82,7 @@ Hi! I'm really excited that you are interested in contributing to Vue.js. Before
 
 ## Development Setup
 
-You will need [Node.js](https://nodejs.org) **version 18.12+**, and [PNPM](https://pnpm.io) **version 8+**.
+You will need [Node.js](https://nodejs.org) with minimum version as specified in the [`.node-version`](https://github.com/vuejs/core/blob/main/.node-version) file, and [PNPM](https://pnpm.io) with minimum version as specified in the [`"packageManager"` field in `package.json`](https://github.com/vuejs/core/blob/main/package.json#L4).
 
 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.