Merge pull request #105 from BNAndras/BNAndras-patch-2

Typo in `triangle` title

Author: codingthat

config.json

@@ -93,7 +93,7 @@
       },
       {
         "slug": "triangle",
-        "name": "triangle",
+        "name": "Triangle",
         "uuid": "9762dd20-acef-4e3e-b304-8ae2a351d866",
         "practices": [],
         "prerequisites": [],