fix(deps): update junit5 monorepo to v5.12.0

Author: renovate[bot]

dependencyManagement/build.gradle.kts

@@ -37,7 +37,7 @@ val opencensusVersion = "0.31.1"
 val prometheusClientVersion = "0.16.0"
 val prometheusServerVersion = "1.3.5"
 val armeriaVersion = "1.31.3"
-val junitVersion = "5.11.4"
+val junitVersion = "5.12.0"
 
 val DEPENDENCIES = listOf(
   "org.junit.jupiter:junit-jupiter-api:${junitVersion}",