fix: add missing cjs entry in package (#3967)

Author: frantic1048

@commitlint/cz-commitlint/index.cjs

@@ -0,0 +1,4 @@
+/** @type {Awaited<typeof import('./lib/index.js')>['prompter']} */
+exports.prompter = async (...args) => {
+	(await import('./lib/index.js')).prompter(...args);
+};

@commitlint/cz-commitlint/package.json

@@ -6,9 +6,10 @@
   "main": "./lib/index.js",
   "exports": {
     "import": "./lib/index.js",
-    "require": "./lib/index.cjs"
+    "require": "./index.cjs"
   },
   "files": [
+    "index.cjs",
     "lib"
   ],
   "keywords": [