fix typo

Author: kfahn22

content/pages/homepage/index.json

@@ -36,7 +36,7 @@
       "148-gift-wrapping",
       "58-3d-earthquake-data-visualization",
       "101-may-the-4th-scrolling-text",
-      "cc1-maurer-rose"
+      "c1-maurer-rose"
     ],
     "challengesCta": {
       "text": "ready to explore? try a challenge!",