Upgrade to JUnit 5.12

Closes gh-34416

Author: sbrannen

build.gradle

@@ -97,7 +97,7 @@ configure([rootProject] + javaProjects) { project ->
 			// TODO Uncomment link to JUnit 5 docs once we execute Gradle with Java 18+.
 			// See https://github.com/spring-projects/spring-framework/issues/27497
 			//
-			// "https://junit.org/junit5/docs/5.11.4/api/",
+			// "https://junit.org/junit5/docs/5.12.0/api/",
 			"https://www.reactive-streams.org/reactive-streams-1.0.3-javadoc/",
 			//"https://javadoc.io/static/io.rsocket/rsocket-core/1.1.1/",
 			"https://r2dbc.io/spec/1.0.0.RELEASE/api/",

framework-platform/framework-platform.gradle

@@ -19,7 +19,7 @@ dependencies {
 	api(platform("org.eclipse.jetty.ee11:jetty-ee11-bom:12.1.0.alpha1"))
 	api(platform("org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.10.1"))
 	api(platform("org.jetbrains.kotlinx:kotlinx-serialization-bom:1.8.0"))
-	api(platform("org.junit:junit-bom:5.11.4"))
+	api(platform("org.junit:junit-bom:5.12.0"))
 	api(platform("org.mockito:mockito-bom:5.15.2"))
 
 	constraints {