Bump confluent.version from 7.4.0 to 7.6.0

Bumps `confluent.version` from 7.4.0 to 7.6.0.

Updates `io.confluent:kafka-schema-registry-client` from 7.4.0 to 7.6.0
- [Commits](confluentinc/schema-registry@v7.4.0...v7.6.0)

Updates `io.confluent:kafka-avro-serializer` from 7.4.0 to 7.6.0
- [Commits](confluentinc/schema-registry@v7.4.0...v7.6.0)

Updates `io.confluent:kafka-json-schema-serializer` from 7.4.0 to 7.6.0
- [Commits](confluentinc/schema-registry@v7.4.0...v7.6.0)

Updates `io.confluent:kafka-protobuf-serializer` from 7.4.0 to 7.6.0
- [Commits](confluentinc/schema-registry@v7.4.0...v7.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -34,7 +34,7 @@
         <assertj.version>3.19.0</assertj.version>
         <avro.version>1.11.1</avro.version>
         <byte-buddy.version>1.12.19</byte-buddy.version>
-        <confluent.version>7.4.0</confluent.version>
+        <confluent.version>7.6.0</confluent.version>
         <datasketches-java.version>3.1.0</datasketches-java.version>
         <groovy.version>3.0.13</groovy.version>
         <jackson.version>2.14.0</jackson.version>