Bump the franz-go group with 2 updates

Bumps the franz-go group with 2 updates: [github.com/twmb/franz-go](https://github.com/twmb/franz-go) and [github.com/twmb/franz-go/pkg/kadm](https://github.com/twmb/franz-go).


Updates `github.com/twmb/franz-go` from 1.14.3 to 1.15.3
- [Changelog](https://github.com/twmb/franz-go/blob/master/CHANGELOG.md)
- [Commits](twmb/franz-go@v1.14.3...v1.15.3)

Updates `github.com/twmb/franz-go/pkg/kadm` from 1.9.0 to 1.10.0
- [Changelog](https://github.com/twmb/franz-go/blob/master/CHANGELOG.md)
- [Commits](twmb/franz-go@v1.9.0...v1.10.0)

---
updated-dependencies:
- dependency-name: github.com/twmb/franz-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: franz-go
- dependency-name: github.com/twmb/franz-go/pkg/kadm
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: franz-go
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -509,9 +509,9 @@ require (
 	github.com/tklauser/numcpus v0.6.1 // indirect
 	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
 	github.com/twitchtv/twirp v8.1.3+incompatible // indirect
-	github.com/twmb/franz-go v1.14.3
-	github.com/twmb/franz-go/pkg/kadm v1.9.0
-	github.com/twmb/franz-go/pkg/kmsg v1.6.1 // indirect
+	github.com/twmb/franz-go v1.15.3
+	github.com/twmb/franz-go/pkg/kadm v1.10.0
+	github.com/twmb/franz-go/pkg/kmsg v1.7.0 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
 	github.com/ulikunitz/xz v0.5.11 // indirect
 	github.com/vbatts/tar-split v0.11.3 // indirect