fix: adjust number of tracks

Author: anyulled

src/data/2025.json

@@ -36,7 +36,7 @@
     "endDay": "2025-06-01T00:00:00"
   },
   "title": "DevBcn - Barcelona Developers Conference ",
-  "trackNumber": 4,
+  "trackNumber": 5,
   "tracks": "Java & JVM | Cloud, DevOps, VMs, Kubernetes | Frontend, JavaScript, TypeScript, Angular, WASM | Leadership, Agile, Diversity | Big Data, Machine Learning, AI, Python",
   "twitter": "https://twitter.com/dev_bcn",
   "youtube": "https://www.youtube.com/dev_bcn"