chore: update roadmap content json (#7957)

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

public/roadmap-content/angular.json

@@ -74,7 +74,7 @@
   },
   "hpShWwL0M57ZAzqkB4I8t": {
     "title": "Angular and History",
-    "description": "Angular is a web framework that empowers developers to build fast, reliable applications.\n\nMaintained by a dedicated team at Google, Angular provides a broad suite of tools, APIs, and libraries to simplify and streamline your development workflow. Angular gives you a solid platform on which to build fast, reliable applications that scale with both the size of your team and the size of your codebase.\n\nVisit the following resources to learn more:",
+    "description": "Angular is a TypeScript-based open-source front-end web framework developed and maintained by Google.\n\nIt is used for building dynamic, single-page web applications (SPAs). Angular provides comprehensive tools, including dependency injection, data binding, routing, and testing, to create robust and scalable web applications.\n\nVisit the following resources to learn more:",
     "links": [
       {
         "title": "What is Angular?",

public/roadmap-content/system-design.json

@@ -1659,21 +1659,10 @@
       }
     ]
   },
-  "n4It-lr7FFtSY83DcGydX": {
-    "title": "Backens for Frontend",
-    "description": "Create separate backend services to be consumed by specific frontend applications or interfaces. This pattern is useful when you want to avoid customizing a single backend for multiple interfaces. This pattern was first described by Sam Newman.\n\nTo learn more, visit the following links:",
-    "links": [
-      {
-        "title": "Backends for Frontends pattern",
-        "url": "https://learn.microsoft.com/en-us/azure/architecture/patterns/backends-for-frontends",
-        "type": "article"
-      },
-      {
-        "title": "Explore top posts about Frontend Development",
-        "url": "https://app.daily.dev/tags/frontend?ref=roadmapsh",
-        "type": "article"
-      }
-    ]
+  "backends-for-frontend@n4It-lr7FFtSY83DcGydX.md": {
+    "title": "Backends for Frontend",
+    "description": "",
+    "links": []
   },
   "4hi7LvjLcv8eR6m-uk8XQ": {
     "title": "Anti-Corruption Layer",