Bump confluent.version from 6.2.11 to 7.5.1

Bumps `confluent.version` from 6.2.11 to 7.5.1.

Updates `io.confluent:kafka-schema-registry-client` from 6.2.11 to 7.5.1
- [Commits](confluentinc/schema-registry@v6.2.11...v7.5.1)

Updates `io.confluent:kafka-connect-avro-converter` from 6.2.11 to 7.5.1
- [Commits](confluentinc/schema-registry@v6.2.11...v7.5.1)

Updates `io.confluent:kafka-avro-serializer` from 6.2.11 to 7.5.1
- [Commits](confluentinc/schema-registry@v6.2.11...v7.5.1)

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

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

pom.xml

@@ -22,7 +22,7 @@
         <jvmTarget>17</jvmTarget>
         <kotlin.version>1.9.10</kotlin.version>
         <mockk.version>1.13.8</mockk.version>
-        <confluent.version>6.2.11</confluent.version>
+        <confluent.version>7.5.1</confluent.version>
         <prosessering.version>2.20231006130620_9b45ded</prosessering.version>
         <felles.version>2.20230905101454_06fa3d7</felles.version>
         <kontrakter.version>3.0_20230921075936_3adfc44</kontrakter.version>