Update data.json

Added Swag Opportunity for Prefix.dev

data.json

@@ -746,6 +746,15 @@
     "dateAdded": "2018-10-20T11:38:34.000Z",
     "tags": ["clothing", "accessories", "expired", "stickers"]
   },
+  {
+    "name": "Prefix.dev",
+    "difficulty": "medium",
+    "description": "Contribute to pixi and rattler-build repositories on prefix.dev and win exciting rewards! Your valuable contributions could earn you premium prefix.dev t-shirts and cool stickers.",
+    "reference": "https://twitter.com/prefix_dev/status/1711380876385292595",
+    "image": "https://i.imgur.com/PSmcqxs.jpg",
+    "dateAdded": "2023-10-23T11:35:00.000Z",
+    "tags": ["clothing", "hacktoberfest", "stickers"]
+  },
   {
     "name": "QMK",
     "difficulty": "medium",