Update homepage

Author: nojaf

package.json

@@ -2,7 +2,7 @@
   "name": "@rescript/webapi",
   "version": "0.1.0",
   "description": "Experimental successor to [rescript-webapi](https://github.com/TheSpyder/rescript-webapi)",
-  "homepage": "https://github.com/rescript-lang/experimental-rescript-webapi",
+  "homepage": "https://rescript-lang.github.io/experimental-rescript-webapi/",
   "bugs": "https://github.com/rescript-lang/experimental-rescript-webapi/issues",
   "repository": {
     "type": "git",