fix typo

Author: kfahn22

content/pages/homepage/index.json

@@ -52,7 +52,7 @@
       "ml5/0-introduction/patt-vira/showcase/contribution-1730433918.json",
       "webgl/2-3d-geometries/showcase/contribution-1728536881.json",
       "challenges/30-phyllotaxis/showcase/contribution-1729177603.json",
-      "challenges/98-quadtree",
+      "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"
     ],