Bump confluentVersion from 7.9.1 to 8.0.0 (#313)

Bumps `confluentVersion` from 7.9.1 to 8.0.0.

Updates `io.confluent:kafka-streams-json-schema-serde` from 7.9.1 to 8.0.0
- [Commits](confluentinc/schema-registry@v7.9.1...v8.0.0)

Updates `io.confluent:kafka-schema-registry-client` from 7.9.1 to 8.0.0
- [Commits](confluentinc/schema-registry@v7.9.1...v8.0.0)

---
updated-dependencies:
- dependency-name: io.confluent:kafka-streams-json-schema-serde
  dependency-version: 8.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: io.confluent:kafka-schema-registry-client
  dependency-version: 8.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -36,7 +36,7 @@ val junitVersion = "5.13.0"
 val junitPioneerVersion = "2.3.0"
 val mockitoVersion = "5.18.0"
 val jmhVersion = "1.37"
-val confluentVersion = "7.9.1"
+val confluentVersion = "8.0.0"
 val vertxVersion = "5.0.1"
 
 dependencies {