eth/catalyst: use setcanonical instead of sethead in simulated fork

eth/catalyst/simulated_beacon.go

@@ -306,7 +306,8 @@ func (c *SimulatedBeacon) Fork(parentHash common.Hash) error {
 	if parent == nil {
 		return errors.New("parent not found")
 	}
-	return c.eth.BlockChain().SetHead(parent.NumberU64())
+	_, err := c.eth.BlockChain().SetCanonical(parent)
+	return err
 }
 
 // AdjustTime creates a new block with an adjusted timestamp.