Bump confluent.version from 7.5.1 to 7.5.3

Bumps `confluent.version` from 7.5.1 to 7.5.3.

Updates `io.confluent:kafka-schema-registry-client` from 7.5.1 to 7.5.3
- [Commits](https://github.com/confluentinc/schema-registry/commits)

Updates `io.confluent:kafka-connect-avro-converter` from 7.5.1 to 7.5.3
- [Commits](https://github.com/confluentinc/schema-registry/commits)

Updates `io.confluent:kafka-avro-serializer` from 7.5.1 to 7.5.3
- [Commits](https://github.com/confluentinc/schema-registry/commits)

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

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

pom.xml

@@ -22,7 +22,7 @@
         <jvmTarget>21</jvmTarget>
         <kotlin.version>1.9.22</kotlin.version>
         <mockk.version>1.13.8</mockk.version>
-        <confluent.version>7.5.1</confluent.version>
+        <confluent.version>7.5.3</confluent.version>
         <prosessering.version>2.20231212093500_bfa0e7c</prosessering.version>
 
         <felles.version>2.20231201131108_ea25dd3</felles.version>