Update param_2.json

Author: Kwonhyukjoon

chain/gno-testnet/param_2.json

@@ -28,7 +28,7 @@
     "cosmos_fee_info" : {
         "base" : "0",
         "rate" : [
-            "0.00001ugnot"
+            "0.00048ugnot"
         ],
         "is_simulable" : false,
         "simulated_gas_multiply" : 1.2,