chore(deps): bump protobufVersion (#956)

Bumps `protobufVersion` from 3.25.2 to 3.25.3.

Updates `com.google.protobuf:protobuf-kotlin` from 3.25.2 to 3.25.3

Updates `com.google.protobuf:protoc` from 3.25.2 to 3.25.3
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.25.2...v3.25.3)

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

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

run/grpc-hello-world-bidi-streaming/build.gradle.kts

@@ -23,7 +23,7 @@ kotlin.sourceSets.all {
 
 val grpcVersion = "1.61.1"
 val grpcKotlinVersion = "1.4.1"
-val protobufVersion = "3.25.2"
+val protobufVersion = "3.25.3"
 val coroutinesVersion = "1.7.3"
 
 dependencies {