added AMD64 CPU as a requirement

Author: ayushpatil2122

content/en/docs/tasks/run-application/run-replicated-stateful-application.md

@@ -37,6 +37,7 @@ on general patterns for running stateful applications in Kubernetes.
 - Some familiarity with MySQL helps, but this tutorial aims to present
   general patterns that should be useful for other systems.
 - You are using the default namespace or another namespace that does not contain any conflicting objects.
+- You need to have a AMD64 CPU.
 
 ## {{% heading "objectives" %}}