Merge branch '2.3.x' into 2.4.x

Closes gh-24672

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/invoke/reflect/OperationMethodParameterTests.java

@@ -86,7 +86,8 @@ class OperationMethodParameterTests {
 		assertThat(parameter.isMandatory()).isFalse();
 	}
 
-	public void isMandatoryWhenJsrNonnullAnnotationShouldReturnTrue() {
+	@Test
+	void isMandatoryWhenJsrNonnullAnnotationShouldReturnTrue() {
 		OperationMethodParameter parameter = new OperationMethodParameter("name",
 				this.exampleJsr305NonNull.getParameters()[1]);
 		assertThat(parameter.isMandatory()).isTrue();