Merge pull request #54847 from mikesir87/remove-play-with-k8s-ru

Remove references to play-with-k8s.com (ru)

Author: k8s-ci-robot

content/ru/includes/task-tutorial-prereqs.md

@@ -7,4 +7,3 @@
 * [iximiuz Labs](https://labs.iximiuz.com/playgrounds?category=kubernetes&filter=all)
 * [Killercoda](https://killercoda.com/playgrounds/scenario/kubernetes)
 * [KodeKloud](https://kodekloud.com/public-playgrounds)
-* [Play with Kubernetes](https://labs.play-with-k8s.com/)