teleportr: Use L2 gas price (#2484)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/funny-zebras-glow.md

+---
+'@eth-optimism/teleportr': patch
+---
+
+Use L2 gas price in driver

go/teleportr/drivers/disburser/driver.go

@@ -291,7 +291,7 @@ func (d *Driver) UpdateGasPrice(
 	tx *types.Transaction,
 ) (*types.Transaction, error) {
 
-	gasPrice, err := d.cfg.L1Client.SuggestGasPrice(ctx)
+	gasPrice, err := d.cfg.L2Client.SuggestGasPrice(ctx)
 	if err != nil {
 		return nil, err
 	}