Update dependency com.google.protobuf:protobuf-bom to v4

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -10,7 +10,7 @@ rootProject.extra["versions"] = dependencyVersions
 val DEPENDENCY_BOMS = listOf(
   "com.fasterxml.jackson:jackson-bom:2.17.1",
   "com.google.guava:guava-bom:33.2.1-jre",
-  "com.google.protobuf:protobuf-bom:3.25.3",
+  "com.google.protobuf:protobuf-bom:4.27.1",
   "com.linecorp.armeria:armeria-bom:1.28.4",
   "com.squareup.okhttp3:okhttp-bom:4.12.0",
   "com.squareup.okio:okio-bom:3.9.0", // applies to transitive dependencies of okhttp