update homepage, fix typo

fix typo

Author: kfahn22

content/pages/challenges/index.json

@@ -2,5 +2,5 @@
   "title": "Challenges",
   "description": "Ready to apply what you’ve learned in the Tracks? Try a Challenge! These one-off project videos build off concepts introduced in Tracks and may have prerequisites (listed on the challenge page itself).",
   "featuredText": "Featured Challenge:",
-  "featuredChallenge": "127-brownian-tree-snowflake"
+  "featuredChallenge": "179-wolfram-alpha"
 }

content/pages/homepage/index.json

@@ -31,7 +31,7 @@
     "title": "Challenges",
     "description": "Watch Dan take on Coding Challenges in p5.js and Processing. The challenge topics include algorithmic art, machine learning, simulation, generative poetry, and more.",
     "featured": [
-      "127-brownian-tree-snowflake",
+      "179-wolfram-alpha",
       "89-langtons-ant",
       "98-quadtree",
       "70-nearest-neighbors-recommendation-engine",

content/videos/challenges/179-wolfram-alpha/index.json

@@ -25,11 +25,19 @@
     {
       "title": "Wolfram CA",
       "description": "",
-      "image": "imgg.jpg",
+      "image": "img.jpg",
       "urls": {
         "p5": "https://editor.p5js.org/codingtrain/sketches/IE77UYZ-G"
       }
-    }
+    },
+     {
+       "title": "Wolfram CA - color",
+       "description": "",
+       "image": "img.jpg",
+       "urls": {
+         "p5": "https://editor.p5js.org/codingtrain/sketches/IE77UYZ-G"
+       }
+     }
   ],
   "groupLinks": [
     {