fix: test: trace_filter test can't be called on head

[rvagg]

Ref:

lotus/node/impl/full/eth_utils.go

Lines 117 to 121 in 4a4ddaa

	height := abi.ChainEpoch(*blkParam.BlockNumber)
	if height > head.Height()-1 {
	return nil, fmt.Errorf("requested a future epoch (beyond 'latest')")
	}
	ts, err := chain.GetTipsetByHeight(ctx, height, head, true)

Ref: https://github.com/filecoin-project/lotus/actions/runs/10665372320/job/29558625838
Ref: #12001 (comment)