Bump com.google.protobuf:protobuf-java from 3.25.5 to 3.25.6

Bumps [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) from 3.25.5 to 3.25.6.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.25.5...v3.25.6)

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

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

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ logback = "1.5.16"
 micrometer = "1.14.3"
 micrometer-docs-gen = "1.0.4"
 micrometer-tracing = "1.4.2"
-protobuf = "3.25.5"
+protobuf = "3.25.6"
 pulsar = "3.3.4"
 pulsar-reactive = "0.5.10"
 reactor = "2024.0.2"