Fix Kotlin example for dependency injection with static factory method

Closes gh-28589

src/docs/asciidoc/core/core-beans.adoc

@@ -1427,6 +1427,7 @@ The following example shows the corresponding `ExampleBean` class:
 			// a static factory method; the arguments to this method can be
 			// considered the dependencies of the bean that is returned,
 			// regardless of how those arguments are actually used.
+			@JvmStatic
 			fun createInstance(anotherBean: AnotherBean, yetAnotherBean: YetAnotherBean, i: Int): ExampleBean {
 				val eb = ExampleBean (...)
 				// some other operations...