Bump org.junit.jupiter:junit-jupiter-engine in /router-protobuf

Bumps [org.junit.jupiter:junit-jupiter-engine](https://github.com/junit-team/junit5) from 5.10.2 to 5.10.3.
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.10.2...r5.10.3)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter-engine
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

router-protobuf/build.gradle.kts

@@ -19,7 +19,7 @@ dependencies {
     implementation("com.google.guava:guava:33.2.1-jre")
     api(project(":router"))
 
-    testImplementation("org.junit.jupiter:junit-jupiter-engine:5.10.2")
+    testImplementation("org.junit.jupiter:junit-jupiter-engine:5.10.3")
     testImplementation("com.willowtreeapps.assertk:assertk-jvm:0.28.1")
     testImplementation("org.assertj:assertj-core:3.26.0")
     testImplementation("io.mockk:mockk:1.13.11")