Update featured showcases

Author: kfahn22

content/pages/homepage/index.json

@@ -47,14 +47,14 @@
   "passengerShowcase": {
     "title": "Passenger showcase highlights",
     "featured": [
-      "challenges/183-mathematical-marbling/showcase/contribution-1714718039.json",
-      "challenges/183-mathematical-marbling/showcase/contribution-1715194171.json",
-      "challenges/78-simple-particle-system/showcase/contribution-1714737129.json",
-      "challenges/30-phyllotaxis/showcase/contribution-1714237829.json",
-      "physics-libraries/box2d/3-coordinate-and-vectors/showcase/contribution-1714548437.json",
-      "noc/3-angles/4-polar-coordinates/showcase/contribution-1714998108.json",
-      "code/1-intro/3-shapes-drawing/showcase/contribution-1713756411.json",
-      "challenges/181-image-stippling/showcase/contribution-1714302429.json"
+      "challenges/160-spring-forces/showcase/contribution-1717812105.json",
+      "noc/4-particles/1-particle-system/showcase/contribution-1716063723.json",
+      "challenges/183-mathematical-marbling/showcase/contribution-5.json",
+      "183-mathematical-marbling/showcase/contribution-1716187224.json",
+      "challenges/93-double-pendulum/showcase/contribution-1717095241.json",
+      "",
+      "",
+      ""
     ],
     "showcaseCta": {
       "text": "Want to see more?",