fixes url of the RPC provider in multinodes

tests/integration/multinodes.nim

@@ -264,7 +264,7 @@ template multinodesuite*(name: string, body: untyped) =
         # Workaround for https://github.com/NomicFoundation/hardhat/issues/2053
         # Do not use websockets, but use http and polling to stop subscriptions
         # from being removed after 5 minutes
-        ethProvider = JsonRpcProvider.new("https://localhost:8545")
+        ethProvider = JsonRpcProvider.new("http://localhost:8545")
         # if hardhat was NOT started by the test, take a snapshot so it can be
         # reverted in the test teardown
         if nodeConfigs.hardhat.isNone: