Bump com.google.protobuf:protobuf-java from 3.25.3 to 4.28.3

Bumps [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.25.3 to 4.28.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](https://github.com/protocolbuffers/protobuf/commits)

---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-java
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

build.gradle.kts

@@ -70,7 +70,7 @@ subprojects {
         set("guavaVersion", "33.3.1-jre")
         set("confluentVersion", "7.7.1")
         set("jacksonVersion", "2.18.1")
-        set("protobufVersion", "3.25.5")
+        set("protobufVersion", "4.28.3")
         set("medeiaValidatorVersion", "1.1.0")
         set("junitVersion", "5.11.3")
         set("mockitoVersion", "5.14.2")

kafka/build.gradle.kts

@@ -35,7 +35,7 @@ dependencies {
     api("io.confluent:kafka-protobuf-serializer:$confluentVersion")
     api("io.confluent:kafka-streams-protobuf-serde:$confluentVersion")
     api("io.confluent:kafka-streams-avro-serde:$confluentVersion")
-    api("com.google.protobuf:protobuf-java:3.25.3")
+    api("com.google.protobuf:protobuf-java:4.28.3")
 
     implementation(project(":parser"))