build(deps): bump github.com/segmentio/kafka-go from 0.4.19 to 0.4.20

Bumps [github.com/segmentio/kafka-go](https://github.com/segmentio/kafka-go) from 0.4.19 to 0.4.20.
- [Release notes](https://github.com/segmentio/kafka-go/releases)
- [Commits](https://github.com/segmentio/kafka-go/compare/v0.4.19...v0.4.20)

---
updated-dependencies:
- dependency-name: github.com/segmentio/kafka-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -15,7 +15,7 @@ require (
 	github.com/miekg/dns v1.1.38 // indirect
 	github.com/opentracing/opentracing-go v1.2.0
 	github.com/segmentio/encoding v0.2.19 // indirect
-	github.com/segmentio/kafka-go v0.4.19
+	github.com/segmentio/kafka-go v0.4.20
 	github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4 // indirect
 	github.com/stretchr/testify v1.7.0
 	github.com/twmb/franz-go v1.1.0