Fix link to homepage

When visiting the www-variant, a `SSL_ERROR_INTERNAL_ERROR_ALERT`
error is displayed by the browser.

package.json

@@ -2,7 +2,7 @@
   "name": "handlebars",
   "version": "5.0.0-alpha.1",
   "description": "Handlebars provides the power necessary to let you build semantic templates effectively with no frustration",
-  "homepage": "https://www.handlebarsjs.com/",
+  "homepage": "https://handlebarsjs.com/",
   "keywords": [
     "handlebars",
     "mustache",