chore: use ESM cspell config (web-infra-dev#7480)

Author: chenjiahan

cspell.config.cjs cspell.config.jscspell.config.cjs renamed to cspell.config.js

@@ -1,6 +1,6 @@
-const { banWords } = require('cspell-ban-words');
+import { banWords } from 'cspell-ban-words';
 
-module.exports = {
+export default {
   version: '0.2',
   language: 'en',
   files: ['**/*.{ts,tsx,js,jsx,md,mdx}'],