Bump protobuf from 4.26.1 to 4.28.2

Bumps `protobuf` from 4.26.1 to 4.28.2.

Updates `com.google.protobuf:protobuf-kotlin-lite` from 4.26.1 to 4.28.2

Updates `com.google.protobuf:protoc` from 4.26.1 to 4.28.2
- [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-kotlin-lite
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.google.protobuf:protoc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

gradle/libs.versions.toml

@@ -46,7 +46,7 @@ kotlinxSerializationJson = "1.6.3"
 ksp = "2.0.20-1.0.25"
 moduleGraph = "2.7.1"
 okhttp = "4.12.0"
-protobuf = "4.26.1"
+protobuf = "4.28.2"
 protobufPlugin = "0.9.4"
 retrofit = "2.11.0"
 retrofitKotlinxSerializationJson = "1.0.0"