Update featured challenges and showcases (#1766)

* update featured challenges and showcases

* fix typo

* update featured showcases

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": "185-dragon-curve"
+  "featuredChallenge": "154-tic-tac-toe-minimax"
 }

content/pages/homepage/index.json

@@ -31,12 +31,12 @@
     "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": [
-      "185-dragon-curve",
-      "152-rdp-algorithm",
-      "158-shape-classifier",
-      "174-graphics-applesoft-basic",
-      "27-fireworks",
-      "19-superellipse"
+      "c5-marching-squares",
+      "178-climate-spiral",
+      "164-slitscan",
+      "162-self-avoiding-walk",
+      "154-tic-tac-toe-minimax",
+      "144-2d-black-hole-visualization"
     ],
     "challengesCta": {
       "text": "ready to explore? try a challenge!",
@@ -47,14 +47,14 @@
   "passengerShowcase": {
     "title": "Passenger showcase highlights",
     "featured": [
-      "challenges/24-perlin-noise-flow-field/showcase/contribution-1727893468.json",
-      "noc/3-angles/4-polar-coordinates/showcase/contribution-1727766867.json",
-      "code/7-arrays/8-objects-images/showcase/contribution-1726937451.json",
-      "challenges/14-fractal-trees-recursive/showcase/contribution-1726000914.json",
-      "challenges/85-the-game-of-life/showcase/contribution-1727724456.json",
-      "transformations/translate-rotate-push-pop/showcase/contribution-1727809803.json",
-      "challenges/163-bezier-curves/showcase/contribution2.json",
-      "challenges/124-flocking-simulation/showcase/contribution26.json"
+      "ml5/hand-pose/showcase/contribution-1731262868.json",
+      "ml5/1-classification/3-object-detection/showcase/contribution-1729685832.json",
+      "ml5/0-introduction/patt-vira/showcase/contribution-1730433918.json",
+      "webgl/2-3d-geometries/showcase/contribution-1728536881.json",
+      "challenges/130-drawing-with-fourier-transform-and-epicycles/showcase/contribution-1728408172.json",
+      "challenges/98-quadtree/showcase/contribution-1729184725.json",
+      "noc/1-vectors/2-vector-math/showcase/contribution-1728692489.json",
+      "transformations/translate-rotate-push-pop/showcase/contribution-1730631464.json"
     ],
     "showcaseCta": {
       "text": "Want to see more?",