build(deps): bump io.confluent:kafka-avro-serializer in /apps/backend

Bumps [io.confluent:kafka-avro-serializer](https://github.com/confluentinc/schema-registry) from 7.6.0 to 7.6.1.
- [Commits](https://github.com/confluentinc/schema-registry/commits)

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

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

apps/backend/pom.xml

@@ -40,7 +40,7 @@
 <!--        <woodstox-core.version>6.5.1</woodstox-core.version>-->
 
         <!-- kafka -->
-        <confluent.version>7.6.0</confluent.version>
+        <confluent.version>7.6.1</confluent.version>
         <avro.version>1.11.3</avro.version> <!-- https://github.com/navikt/team-catalog/security/dependabot/109 -->
 
         <!-- Test -->