Fix liquid URLs

Author: shaedrich

feed.json.liquid

@@ -42,11 +42,11 @@ permalink: feed.json
         "logo": {% if topic.logo == null %}
           null,
         {% else %}
-          "{{ site.url | replace: "github.", "explore-feed.github." }}{{ topic.id | remove_first: "/index" }}/{{ topic.logo }}",
+          "{{ site.url }}{{ topic.id | remove_first: "/index" }}/{{ topic.logo }}",
         {% endif %}
         "released": {{ topic.released | jsonify }},
         "short_description": {{ topic.short_description | jsonify }},
-        "url": "{{ site.url }}{{ topic.url | remove_first: "/index.html" }}",
+        "url": "{{ site.url | replace: "explore-feed.github.", "github." }}{{ topic.url | remove_first: "/index.html" }}",
         "wikipedia_url": {{ topic.wikipedia_url | jsonify }},
         "related": [
           {% for related_topic in related %}