increase default gas limit from 30M to 36M (#6763)

Author: tersec

beacon_chain/conf.nim

@@ -52,7 +52,7 @@ const
   defaultSigningNodeRequestTimeout* = 60
   defaultBeaconNode* = "http://127.0.0.1:" & $defaultEth2RestPort
   defaultBeaconNodeUri* = parseUri(defaultBeaconNode)
-  defaultGasLimit* = 30_000_000
+  defaultGasLimit* = 36_000_000
   defaultAdminListenAddressDesc* = $defaultAdminListenAddress
   defaultBeaconNodeDesc = $defaultBeaconNode