Bump confluent from 7.5.3 to 7.6.0 (#324)

Bumps `confluent` from 7.5.3 to 7.6.0.

Updates `io.confluent:kafka-avro-serializer` from 7.5.3 to 7.6.0
- [Commits](https://github.com/confluentinc/schema-registry/commits)

Updates `io.confluent:kafka-schema-registry` from 7.5.3 to 7.6.0

---
updated-dependencies:
- dependency-name: io.confluent:kafka-avro-serializer
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: io.confluent:kafka-schema-registry
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -10,7 +10,7 @@ val flywayVersion = "9.22.3"
 val tokenSupportVersion = "3.2.0"
 val mockkVersion = "1.13.9"
 val springMockkVersion = "3.1.1"
-val confluent = "7.5.3"
+val confluent = "7.6.0"
 val isdialogmoteSchema = "1.0.5"
 val jsoupVersion = "1.17.2"
 val logstashVersion = "4.10"