update milkyway gas

Author: wannabit-yongjoo

chain/milkyway/param_2.json

@@ -25,7 +25,7 @@
     "cosmos_fee_info" : {
         "base": "0",
         "rate": [
-            "0umilk"
+            "0.1ugas,0.1ibc/16065EE5282C5217685C8F084FC44864C25C706AC37356B0D62811D50B96920F,0.1ibc/6C349F0EB135C5FA99301758F35B87DB88403D690E5E314AB080401FEE4066E5,0.1ibc/8D4FC51F696E03711B9B37A5787FB89BD2DDBAF788813478B002D552A12F9157,0.1ibc/F1183DB3D428313A6FD329DF18219F9D6B83257D07D292EA9EC1D877E89EC2B0"
         ],
         "is_simulable": true,
         "simulated_gas_multiply": 1.2,