Bump the franz-go group across 1 directory with 3 updates

Bumps the franz-go group with 2 updates in the / directory: [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 1.18.2-0.20250413173443-1d5a55fa468d to 1.19.1
- [Changelog](https://github.com/twmb/franz-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/twmb/franz-go/commits/v1.19.1)

Updates `github.com/twmb/franz-go/pkg/kadm` from 1.12.0 to 1.16.0
- [Changelog](https://github.com/twmb/franz-go/blob/master/CHANGELOG.md)
- [Commits](twmb/franz-go@v1.12.0...v1.16.0)

Updates `github.com/twmb/franz-go/pkg/kmsg` from 1.11.2-0.20250413173443-1d5a55fa468d to 1.11.2
- [Changelog](https://github.com/twmb/franz-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/twmb/franz-go/commits/v1.11.2)

---
updated-dependencies:
- dependency-name: github.com/twmb/franz-go
  dependency-version: 1.19.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: franz-go
- dependency-name: github.com/twmb/franz-go/pkg/kadm
  dependency-version: 1.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: franz-go
- dependency-name: github.com/twmb/franz-go/pkg/kmsg
  dependency-version: 1.11.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: franz-go
...

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

Author: dependabot[bot]

go.mod

@@ -342,9 +342,9 @@ require (
 	github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635
 	github.com/tinylib/msgp v1.6.1
 	github.com/tklauser/go-sysconf v0.3.16 // indirect
-	github.com/twmb/franz-go v1.18.2-0.20250413173443-1d5a55fa468d
-	github.com/twmb/franz-go/pkg/kadm v1.12.0
-	github.com/twmb/franz-go/pkg/kmsg v1.11.2-0.20250413173443-1d5a55fa468d
+	github.com/twmb/franz-go v1.20.6
+	github.com/twmb/franz-go/pkg/kadm v1.17.1
+	github.com/twmb/franz-go/pkg/kmsg v1.12.0
 	github.com/twmb/murmur3 v1.1.8
 	github.com/uptrace/bun v1.2.15
 	github.com/uptrace/bun/dialect/pgdialect v1.2.15