Bump github.com/cosmos/ibc-go/v8 from 8.0.0 to 8.4.0 in /demo

Bumps [github.com/cosmos/ibc-go/v8](https://github.com/cosmos/ibc-go) from 8.0.0 to 8.4.0.
- [Release notes](https://github.com/cosmos/ibc-go/releases)
- [Changelog](https://github.com/cosmos/ibc-go/blob/main/CHANGELOG.md)
- [Commits](cosmos/ibc-go@v8.0.0...v8.4.0)

---
updated-dependencies:
- dependency-name: github.com/cosmos/ibc-go/v8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

demo/go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/cosmos/gogogateway v1.2.0 // indirect
 	github.com/cosmos/gogoproto v1.4.12
 	github.com/cosmos/iavl v1.1.2 // indirect
-	github.com/cosmos/ibc-go/v8 v8.3.2
+	github.com/cosmos/ibc-go/v8 v8.4.0
 	github.com/cosmos/ics23/go v0.10.0 // indirect
 	github.com/dvsekhvalnov/jose2go v1.6.0 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect

demo/go.sum

@@ -366,8 +366,8 @@ github.com/cosmos/iavl v1.1.2 h1:zL9FK7C4L/P4IF1Dm5fIwz0WXCnn7Bp1M2FxH0ayM7Y=
 github.com/cosmos/iavl v1.1.2/go.mod h1:jLeUvm6bGT1YutCaL2fIar/8vGUE8cPZvh/gXEWDaDM=
 github.com/cosmos/ibc-go/modules/capability v1.0.0 h1:r/l++byFtn7jHYa09zlAdSeevo8ci1mVZNO9+V0xsLE=
 github.com/cosmos/ibc-go/modules/capability v1.0.0/go.mod h1:D81ZxzjZAe0ZO5ambnvn1qedsFQ8lOwtqicG6liLBco=
-github.com/cosmos/ibc-go/v8 v8.3.2 h1:8X1oHHKt2Bh9hcExWS89rntLaCKZp2EjFTUSxKlPhGI=
-github.com/cosmos/ibc-go/v8 v8.3.2/go.mod h1:WVVIsG39jGrF9Cjggjci6LzySyWGloz194sjTxiGNIE=
+github.com/cosmos/ibc-go/v8 v8.4.0 h1:K2PfX0AZ+1XKZytHGEMuSjQXG/MZshPb83RSTQt2+cE=
+github.com/cosmos/ibc-go/v8 v8.4.0/go.mod h1:zh6x1osR0hNvEcFrC/lhGD08sMfQmr9wHVvZ/mRWMCs=
 github.com/cosmos/ics23/go v0.10.0 h1:iXqLLgp2Lp+EdpIuwXTYIQU+AiHj9mOC2X9ab++bZDM=
 github.com/cosmos/ics23/go v0.10.0/go.mod h1:ZfJSmng/TBNTBkFemHHHj5YY7VAU/MBU980F4VU1NG0=
 github.com/cosmos/keyring v1.2.0 h1:8C1lBP9xhImmIabyXW4c3vFjjLiBdGCmfLUfeZlV1Yo=