Bump org.slf4j:slf4j-simple from 2.0.13 to 2.0.16 in /router-protobuf

Bumps org.slf4j:slf4j-simple from 2.0.13 to 2.0.16.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-simple
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

router-protobuf/build.gradle.kts

@@ -22,7 +22,7 @@ dependencies {
     testImplementation("com.willowtreeapps.assertk:assertk-jvm:0.28.1")
     testImplementation("org.assertj:assertj-core:3.26.0")
     testImplementation("io.mockk:mockk:1.13.11")
-    testImplementation("org.slf4j:slf4j-simple:2.0.13")
+    testImplementation("org.slf4j:slf4j-simple:2.0.16")
     testImplementation("com.jayway.jsonpath:json-path:2.9.0")
 }