fix: Use the recommended property to specify repository URL (#10665) …

…[ci-skip]

Use recommended by npm property to specify repository URL
https://docs.npmjs.com/files/package.json#repository

Otherwise, it breaks some tools which relay on this convention for example "nlf" package
https://github.com/iandotkelly/nlf/blob/master/lib/nlf.js#L284-L285

packages/babel-helper-create-regexp-features-plugin/package.json

@@ -6,7 +6,7 @@
   "description": "Compile ESNext Regular Expressions to ES5",
   "repository": {
     "type": "git",
-    "repository": "https://github.com/babel/babel",
+    "url": "https://github.com/babel/babel",
     "directory": "packages/babel-helper-create-regexp-features-plugin"
   },
   "main": "lib/index.js",