doc: update file quickstart/client.mdx (modelcontextprotocol#194)

`Node.js 16 or higher installed` => `Node.js 17 or higher installed`
why => `readline` requires NodeJS 17 or above.
`import readline from "readline/promises";`

Author: samuel871211

quickstart/client.mdx

@@ -407,7 +407,7 @@ If you see:
 
 Before starting, ensure your system meets these requirements:
 - Mac or Windows computer
-- Node.js 16 or higher installed
+- Node.js 17 or higher installed
 - Latest version of `npm` installed
 - Anthropic API key (Claude)