Fix Kotlin example for @Required

[maxbiu]

https://docs.spring.io/spring-framework/docs/current/reference/html/core.html#beans-required-annotation

class SimpleMovieLister {
    lateinit var movieFinder: MovieFinder
             @Required
              set
    // ...
}

[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.

[sdeleuze]

I created #28630 to refine the fix for this issue, see the related comment.