fix: downgrade ibc main (#3426)

## Overview

downgrading IBC due to an last results mismatch

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/cosmos/cosmos-sdk v0.46.16
 	github.com/cosmos/gogoproto v1.4.12
 	github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 v6.1.2
-	github.com/cosmos/ibc-go/v6 v6.3.1
+	github.com/cosmos/ibc-go/v6 v6.2.1
 	github.com/ethereum/go-ethereum v1.14.0
 	github.com/gogo/protobuf v1.3.3
 	github.com/golang/mock v1.6.0

go.sum

@@ -435,8 +435,8 @@ github.com/cosmos/iavl v0.19.6 h1:XY78yEeNPrEYyNCKlqr9chrwoeSDJ0bV2VjocTk//OU=
 github.com/cosmos/iavl v0.19.6/go.mod h1:X9PKD3J0iFxdmgNLa7b2LYWdsGd90ToV5cAONApkEPw=
 github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 v6.1.2 h1:Hz4nkpStoXIHrC77CIEyu2mRiN2qysGEZPFRf0fpv7w=
 github.com/cosmos/ibc-apps/middleware/packet-forward-middleware/v6 v6.1.2/go.mod h1:Jo934o/sW7fNxuOa/TjCalSalz+1Fd649eLyANaJx8g=
-github.com/cosmos/ibc-go/v6 v6.3.1 h1:/5ur3AsmNW8WuOevfODHlaY5Ze236PBNE3vVo9o3fQA=
-github.com/cosmos/ibc-go/v6 v6.3.1/go.mod h1:Dm14j9s094bGyCEE8W4fD+2t8IneHv+cz+80Mvwjr1w=
+github.com/cosmos/ibc-go/v6 v6.2.1 h1:NiaDXTRhKwf3n9kELD4VRIe5zby1yk1jBvaz9tXTQ6k=
+github.com/cosmos/ibc-go/v6 v6.2.1/go.mod h1:XLsARy4Y7+GtAqzMcxNdlQf6lx+ti1e8KcMGv5NIK7A=
 github.com/cosmos/ledger-cosmos-go v0.12.4 h1:drvWt+GJP7Aiw550yeb3ON/zsrgW0jgh5saFCr7pDnw=
 github.com/cosmos/ledger-cosmos-go v0.12.4/go.mod h1:fjfVWRf++Xkygt9wzCsjEBdjcf7wiiY35fv3ctT+k4M=
 github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=