Update community-events.json

Added an upcoming Ethereum-focused event tied to EthCC Cannes

Author: Nik-EpicWeb3

src/data/community-events.json

@@ -791,4 +791,13 @@
     "description": "ETHIstanbul is a conference and hackathon connecting you with global talents, industry professionals, and web3 companies advancing technology.",
     "imageUrl": "https://ethistanbul.io/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fistanbul-background.99d6ad2a.webp&w=3840&q=75"
   }
+    {
+    "title": "L2con",
+    "startDate": "2025-07-01",
+    "endDate": "2025-07-01",
+    "href": "https://lu.ma/L2conCannes/",
+    "location": "Cannes, FR",
+    "description": "​L2con is the largest EthCC[8] conference focused on the future of the scaling ecosystem, General-Purpose Chains and App-Chains, development of dApps, and what unites us all — achieving mass adoption.",
+    "imageUrl": "https://images.lumacdn.com/event-covers/cu/93aa5fca-1515-4a6a-aed3-9d933d8faf73.gif"
+  }
 ]