chore: update roadmap content json (#7649)

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

public/roadmap-content/api-design.json

@@ -176,7 +176,7 @@
         "type": "article"
       },
       {
-        "title": "Cookes - Mozilla",
+        "title": "Cookies - Mozilla",
         "url": "https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/cookies",
         "type": "article"
       }

public/roadmap-content/cyber-security.json

@@ -811,13 +811,8 @@
         "type": "article"
       },
       {
-        "title": "Lets subnet your home network!",
-        "url": "https://www.youtube.com/watch?v=mJ_5qeqGOaI&list=PLIhvC56v63IKrRHh3gvZZBAGvsvOhwrRF&index=6",
-        "type": "video"
-      },
-      {
-        "title": "Subnetting for hackers",
-        "url": "https://www.youtube.com/watch?v=o0dZFcIFIAw",
+        "title": "Subnetting",
+        "url": "https://www.youtube.com/playlist?list=PLIhvC56v63IKrRHh3gvZZBAGvsvOhwrRF",
         "type": "video"
       }
     ]