Bump com.google.protobuf:protoc from 4.28.2 to 4.28.3

Bumps [com.google.protobuf:protoc](https://github.com/protocolbuffers/protobuf) from 4.28.2 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:protoc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle.kts

@@ -60,7 +60,7 @@ tasks.shadowJar {
 
 protobuf {
     protoc {
-        artifact = "com.google.protobuf:protoc:4.28.2"
+        artifact = "com.google.protobuf:protoc:4.28.3"
     }
 }