Fix Kotlin example for dependency injection with static factory method

[maxbiu]

https://docs.spring.io/spring-framework/docs/current/reference/html/core.html#beans-some-examples

kotlin changed to:

class ExampleBean private constructor() {
    companion object {
        // 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...
            return eb
        }
    }
}

[sbrannen]

Thanks for pointing this out.

This has been addressed in 5.3.x and main.

In the future, when you come across issues like this with the documentation feel free to submit a PR that contains the fix.