legacy market bump (#679)

* legacy market bump

* bump version

---------

Co-authored-by: kaleb <[email protected]>

Author: dbeal-eth

omnibus-mainnet.toml

@@ -1,5 +1,5 @@
 name = "synthetix-omnibus"
-version = "17"
+version = "18"
 description = "Includes the full synthetix system with configurations applied"
 deployers = [
     "0x1C8236B406911A376369e33D39189F1b4B39F27D",
@@ -49,7 +49,7 @@ defaultValue = "synthetix-spot-market:3.3.15"
 defaultValue = "synthetix-perps-market:3.3.19"
 
 [setting.legacy_market_package]
-defaultValue = "synthetix-legacy-market:3.12.0"
+defaultValue = "synthetix-legacy-market:3.12.1"
 
 [setting.treasury_market_package]
 defaultValue = "synthetix-treasury-market:3.12.0"