docs: use node: imports for node core modules (#39695)

docs: use `node:` imports for node builtin modules

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: Erick Zhao <erick@hotmail.ca>

docs/tutorial/performance.md

@@ -173,7 +173,7 @@ equally fictitious `foo-parser` module. In traditional Node.js development,
 you might write code that eagerly loads dependencies:
 
 ```js title='parser.js' @ts-expect-error=[2]
-const fs = require('fs')
+const fs = require('node:fs')
 const fooParser = require('foo-parser')
 
 class Parser {
@@ -197,7 +197,7 @@ do this work a little later, when `getParsedFiles()` is actually called?
 
 ```js title='parser.js' @ts-expect-error=[20]
 // "fs" is likely already being loaded, so the `require()` call is cheap
-const fs = require('fs')
+const fs = require('node:fs')
 
 class Parser {
   async getFiles () {