Bump the prod-deps group across 1 directory with 3 updates

Bumps the prod-deps group with 3 updates in the / directory: [io.confluent:kafka-schema-registry-client](https://github.com/confluentinc/schema-registry), [io.confluent:kafka-avro-serializer](https://github.com/confluentinc/schema-registry) and [org.testcontainers:testcontainers-bom](https://github.com/testcontainers/testcontainers-java).


Updates `io.confluent:kafka-schema-registry-client` from 7.8.0 to 7.9.0
- [Commits](confluentinc/schema-registry@v7.8.0...v7.9.0)

Updates `io.confluent:kafka-avro-serializer` from 7.8.0 to 7.9.0
- [Commits](confluentinc/schema-registry@v7.8.0...v7.9.0)

Updates `io.confluent:kafka-avro-serializer` from 7.8.0 to 7.9.0
- [Commits](confluentinc/schema-registry@v7.8.0...v7.9.0)

Updates `org.testcontainers:testcontainers-bom` from 1.20.4 to 1.20.5
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.4...1.20.5)

---
updated-dependencies:
- dependency-name: io.confluent:kafka-schema-registry-client
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: prod-deps
- dependency-name: io.confluent:kafka-avro-serializer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: prod-deps
- dependency-name: io.confluent:kafka-avro-serializer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: prod-deps
- dependency-name: org.testcontainers:testcontainers-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-deps
...

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

pom.xml

@@ -39,7 +39,7 @@
         <fp-kontrakter.version>9.2.2</fp-kontrakter.version>
 
         <!-- Eksterne -->
-        <confluent.version>7.8.0</confluent.version>
+        <confluent.version>7.9.0</confluent.version>
     </properties>
 
     <dependencyManagement>
@@ -159,7 +159,7 @@
             <dependency>
                 <groupId>org.testcontainers</groupId>
                 <artifactId>testcontainers-bom</artifactId>
-                <version>1.20.4</version>
+                <version>1.20.5</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>