added new review-bot rule #4

Job	Run time
Extract tasks from matrix	2s
check-migrations (polkadot, polkadot-runtime, relay/polkadot, wss://polkadot-try-runtime-node.par...	8m 37s
check-migrations (kusama, staging-kusama-runtime, relay/kusama, wss://kusama-try-runtime-node.par...	8m 37s
check-migrations (asset-hub-kusama, asset-hub-kusama-runtime, system-parachains/asset-hubs/asset-...	8m 38s
check-migrations (asset-hub-polkadot, asset-hub-polkadot-runtime, system-parachains/asset-hubs/as...	8m 35s
check-migrations (bridge-hub-kusama, bridge-hub-kusama-runtime, system-parachains/bridge-hubs/bri...	8m 36s
check-migrations (bridge-hub-polkadot, bridge-hub-polkadot-runtime, system-parachains/bridge-hubs...	8m 36s
check-migrations (collectives-polkadot, collectives-polkadot-runtime, system-parachains/collectiv...	8m 35s
check-migrations (encointer-kusama, encointer-kusama-runtime, system-parachains/encointer, wss://...	8m 35s
	1h 8m 51s

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