chore(deps): bump protobuf.version in /run/grpc-hello-world-mvn (#941)

Bumps `protobuf.version` from 3.25.2 to 3.25.3.

Updates `com.google.protobuf:protobuf-java` 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)

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

---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-java
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: com.google.protobuf:protobuf-kotlin
  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-mvn/pom.xml

@@ -14,7 +14,7 @@
     <kotlinx.coroutines.version>1.7.3</kotlinx.coroutines.version>
     <grpc.version>1.61.1</grpc.version>
     <grpc.kotlin.version>1.4.1</grpc.kotlin.version>
-    <protobuf.version>3.25.2</protobuf.version>
+    <protobuf.version>3.25.3</protobuf.version>
   </properties>
 
   <dependencies>