docs: update LlamaCpp input args (#9173)

This PR only updates the LlamaCpp args documentation. The input arg has
been flattened.

docs/extras/integrations/llms/llamacpp.ipynb

@@ -241,7 +241,9 @@
     "# Make sure the model path is correct for your system!\n",
     "llm = LlamaCpp(\n",
     "    model_path=\"/Users/rlm/Desktop/Code/llama/llama-2-7b-ggml/llama-2-7b-chat.ggmlv3.q4_0.bin\",\n",
-    "    input={\"temperature\": 0.75, \"max_length\": 2000, \"top_p\": 1},\n",
+    "    temperature=0.75,\n",
+    "    max_length=2000,\n",
+    "    top_p=1,\n",
     "    callback_manager=callback_manager,\n",
     "    verbose=True,\n",
     ")"