Bump the gradle group with 2 updates

Bumps the gradle group with 2 updates: [io.confluent:kafka-connect-avro-converter](https://github.com/confluentinc/schema-registry) and [io.confluent:kafka-avro-serializer](https://github.com/confluentinc/schema-registry).


Updates `io.confluent:kafka-connect-avro-converter` from 7.8.0 to 7.8.1
- [Commits](confluentinc/schema-registry@v7.8.0...v7.8.1)

Updates `io.confluent:kafka-avro-serializer` from 7.8.0 to 7.8.1
- [Commits](confluentinc/schema-registry@v7.8.0...v7.8.1)

Updates `io.confluent:kafka-avro-serializer` from 7.8.0 to 7.8.1
- [Commits](confluentinc/schema-registry@v7.8.0...v7.8.1)

---
updated-dependencies:
- dependency-name: io.confluent:kafka-connect-avro-converter
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: io.confluent:kafka-avro-serializer
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
- dependency-name: io.confluent:kafka-avro-serializer
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: gradle
...

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

build.gradle.kts

@@ -22,7 +22,7 @@ configurations {
     }
 }
 
-val confluentVersion = "7.8.0"
+val confluentVersion = "7.8.1"
 val springCloudVersion = "4.2.0"
 val logstashLogbackEncoderVersion = "8.0"
 val tokenSupportVersion = "5.0.16"