docs: Fix API ref link (#7462)

docs/core_docs/docs/integrations/chat/cerebras.ipynb

@@ -31,9 +31,7 @@
         "\n",
         "Our CS-3 systems can be quickly and easily clustered to create the largest AI supercomputers in the world, making it simple to place and run the largest models. Leading corporations, research institutions, and governments are already using Cerebras solutions to develop proprietary models and train popular open-source models.\n",
         "\n",
-        "Want to experience the power of Cerebras? Check out our [website](https://cerebras.ai/) for more resources and explore options for accessing our technology through the Cerebras Cloud or on-premise deployments!\n",
-        "\n",
-        "For more information about Cerebras Cloud, visit [cloud.cerebras.ai](https://cloud.cerebras.ai/). Our API reference is available at [inference-docs.cerebras.ai](https://inference-docs.cerebras.ai).\n",
+        "This will help you getting started with ChatCerebras [chat models](/docs/concepts/chat_models). For detailed documentation of all ChatCerebras features and configurations head to the [API reference](https://api.js.langchain.com/classes/_langchain_cerebras.ChatCerebras.html).\n",
         "\n",
         "## Overview\n",
         "\n",
@@ -314,7 +312,7 @@
       "source": [
         "## API reference\n",
         "\n",
-        "For detailed documentation of all ChatCerebras features and configurations head to the API reference: https://api.js.langchain.com/classes/langchain_cerebras.ChatCerebras.html"
+        "For detailed documentation of all ChatCerebras features and configurations head to the API reference: https://api.js.langchain.com/classes/_langchain_cerebras.ChatCerebras.html"
       ]
     }
   ],