Update Kubernetes README (#6616)
Update Kubernetes README (#6616)

* Update README.md with the new format for the integration tile

* Update README.md to remove an old installation link

* Link kubernetes_state integration from legacy tile

* Fix kubernetes to Kubernetes

* Fix link

* Remove legacy A5 instructions

Co-authored-by: Yair Cohen <371a7fa09fe5492b1df1e4e8e5140ea3a7f7257f@outlook.com>
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core