Improve a bit Hugo detection (#2232)

This can be checked [here](http://blog.ralch.com/tutorial/golang-embedded-resources/)

src/apps.json

@@ -4293,6 +4293,7 @@
       "meta": {
         "generator": "Hugo ([\\d.]+)?\\;version:\\1"
       },
+      "html": "powered by <a [^>]*href=\"http://hugo.spf13.com",
       "website": "http://gohugo.io"
     },
     "Hybris": {