chore: update roadmap content json (#8511)

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

public/roadmap-content/ai-data-scientist.json

@@ -49,6 +49,11 @@
         "title": "Algebra and Differential Calculus for Data Science",
         "url": "https://imp.i384100.net/LX5M7M",
         "type": "article"
+      },
+      {
+        "title": "Calculus Youtube Course",
+        "url": "https://www.youtube.com/playlist?list=PLZHQObOWTQDMsr9K-rj53DwVRMYO3t5Yr",
+        "type": "video"
       }
     ]
   },

public/roadmap-content/ai-engineer.json

@@ -1265,7 +1265,7 @@
     "links": [
       {
         "title": "Supabase Vector",
-        "url": "https://supabase.com/vector",
+        "url": "https://supabase.com/docs/guides/ai",
         "type": "article"
       },
       {
@@ -1685,7 +1685,7 @@
     "links": [
       {
         "title": "Low or High Fidelity Image Understanding - OpenAI",
-        "url": "https://platform.openai.com/docs/guides/vision/low-or-high-fidelity-image-understanding",
+        "url": "https://platform.openai.com/docs/guides/images",
         "type": "article"
       }
     ]

public/roadmap-content/cpp.json

@@ -341,8 +341,24 @@
   },
   "hNBErGNiegLsUJn_vgcOR": {
     "title": "Virtual Methods",
-    "description": "",
-    "links": []
+    "description": "Virtual functions enable runtime polymorphism in C++, allowing derived classes to override base class behavior. When called via a base pointer/reference, the _actual object's type_ determines which function is executed (dynamic dispatch). Non-virtual functions use compile-time resolution based on the pointer/reference type (static dispatch), which prevents overriding.\n\n    // Base class with virtual function\n    class Animal {\n    public:\n        virtual void speak() { std::cout << \"Generic sound\"; }\n    };\n    \n    // Derived class override\n    class Dog : public Animal {\n    public:\n        void speak() override { std::cout << \"Woof!\"; } // Dynamic dispatch\n    };\n    \n\nVisit the following resources to learn more:",
+    "links": [
+      {
+        "title": "C++ Virtual Functions Documentation",
+        "url": "https://en.cppreference.com/w/cpp/language/virtual",
+        "type": "article"
+      },
+      {
+        "title": "GeeksforGeeks Virtual Functions Guide",
+        "url": "https://www.geeksforgeeks.org/virtual-function-cpp/",
+        "type": "article"
+      },
+      {
+        "title": "Virtual Functions Explained (YouTube)",
+        "url": "https://www.youtube.com/watch?v=oIV2KchSyGQ&ab_channel=TheCherno",
+        "type": "video"
+      }
+    ]
   },
   "s99ImazcwCgAESxZd8ksa": {
     "title": "Virtual Tables",

public/roadmap-content/devrel.json

@@ -201,7 +201,7 @@
   },
   "LRZ8yxTfEGCXsYp4N1_uD": {
     "title": "Public Speaking",
-    "description": "",
+    "description": "Public speaking is very important for a Developer Relations (DevRel) role, though its exact importance depends on the specific job and company. DevRel professionals act as a bridge between a company (often its tech or product team) and the developer community, so communication—especially in public settings—is a core part of the gig.",
     "links": []
   },
   "0ntOE6PSdMl_EXB9gdgIv": {

public/roadmap-content/postgresql-dba.json

@@ -228,12 +228,7 @@
     "links": [
       {
         "title": "Managing Databases",
-        "url": "https://www.postgresql.org/docs/8.1/managing-databases.html",
-        "type": "article"
-      },
-      {
-        "title": "Managing a Database",
-        "url": "https://www.postgresql.org/docs/7.1/start-manage-db.html",
+        "url": "https://www.postgresql.org/docs/current/managing-databases.html",
         "type": "article"
       }
     ]