Yoga Docs: Rename website-next to website (#1613)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1613

So that GitHub links to edit a page point to the right place.

This will fail in OSS build until I switch the directory used by Vercel instance, but I am waiting to do that until ready to land, since that would cause other in progress changes to fail when exported.

Reviewed By: joevilches

Differential Revision: D54837857

package.json

@@ -12,7 +12,7 @@
   "workspaces": [
     "javascript",
     "gentest",
-    "website-next"
+    "website"
   ],
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "^5.30.5",