another small tweak

Author: ordian

polkadot/zombienet_tests/functional/0005-parachains-disputes-past-session.toml

@@ -5,7 +5,7 @@ bootnode = true
 [relaychain.genesis.runtime.configuration.config]
   max_validators_per_core = 1
   needed_approvals = 2
-  group_rotation_frequency = 4
+  group_rotation_frequency = 2
 
 [relaychain]
 default_image = "{{ZOMBIENET_INTEGRATION_TEST_IMAGE}}"