chore: update roadmap content json (#8809)

Co-authored-by: kamranahmedse <4921183+kamranahmedse@users.noreply.github.com>

public/roadmap-content/backend.json

@@ -2184,11 +2184,6 @@
         "url": "https://docs.aws.amazon.com/wellarchitected/2022-03-31/framework/rel_mitigate_interaction_failure_throttle_requests.html",
         "type": "article"
       },
-      {
-        "title": "Throttling and Debouncing",
-        "url": "https://dev.to/aneeqakhan/throttling-and-debouncing-explained-1ocb",
-        "type": "article"
-      },
       {
         "title": "Throttling vs Debouncing",
         "url": "https://www.youtube.com/watch?v=tJhA0DrH5co",

public/roadmap-content/kubernetes.json

@@ -65,11 +65,6 @@
         "url": "https://kubernetes.io/docs/concepts/overview/#why-you-need-kubernetes-and-what-can-it-do",
         "type": "article"
       },
-      {
-        "title": "Why should you use Kubernetes?",
-        "url": "https://www.predicagroup.com/blog/why-kubernetes-2022/",
-        "type": "article"
-      },
       {
         "title": "Primer: How Kubernetes Came to Be, What It Is, and Why You Should Care",
         "url": "https://thenewstack.io/primer-how-kubernetes-came-to-be-what-it-is-and-why-you-should-care/",