Fix JSON syntax

resources/general.json

@@ -73,7 +73,7 @@
       "desc": "It's a great collection for learning materials for all sorts of programming topics.",
       "url": "https://webgems.io",
       "tags": ["quick", "resources", "basics", "search", "aggregator"]
-    }
+    },
     {
       "title": "Codesignal",
       "desc": "Online programming tournaments to practice your skills. Play with random people, your friends, or in the singleplayer arcade mode.",