Bump io.confluent:kafka-avro-serializer from 5.3.0 to 7.5.2 (#18)

Bumps [io.confluent:kafka-avro-serializer](https://github.com/confluentinc/schema-registry) from 5.3.0 to 7.5.2.
- [Commits](confluentinc/schema-registry@v5.3.0...v7.5.2)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -38,7 +38,7 @@ subprojects {
     implementation("org.springframework.boot:spring-boot-starter-webflux")
     implementation("org.springframework.cloud:spring-cloud-starter-stream-kafka")
 
-    implementation("io.confluent:kafka-avro-serializer:5.3.0")
+    implementation("io.confluent:kafka-avro-serializer:7.5.2")
     implementation("org.apache.avro:avro:1.11.3")
 
     testImplementation("org.springframework.boot:spring-boot-starter-test")