Update Privacy Hackathon

We have some more concrete information why we would like to update the event.

Author: lizhophardt

src/data/community-events.json

@@ -513,12 +513,12 @@
     "endDate": "2023-03-16"
   },
   {
-    "title": "The First Hackathon around Privacy",
+    "title": "ETH Privacy – The First Hackathon around Privacy",
     "to": "https://www.leadingprivacy.com/istanbul",
     "sponsor": null,
     "location": "Turkey, Istanbul",
-    "description": "We will celebrate privacy and discuss latest findings & development, as well as must haves and upcoming opportunities of the Ethereum Ecosystem.",
-    "startDate": "2023-04-29",
+    "description": "Buidl on the future of privacy for crypto wallets and more.",
+    "startDate": "2023-04-27",
     "endDate": "2023-04-30"
   },
   {