Update crates/charon-cluster/src/examples/cluster-definition-005.json

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: varex83

crates/charon-cluster/src/examples/cluster-definition-005.json

@@ -32,7 +32,7 @@
   ],
   "uuid": "B6AE17B3-78F5-147B-2C37-2572B93437DF",
   "version": "v1.8.0",
-  "timestamp": "2023-05-18T15: 12: 46+02: 00",
+  "timestamp": "2023-05-18T15:12:46+02:00",
   "num_validators": 2,
   "threshold": 3,
   "validators": [