fix additional_args and num_ctx examples also in zh docs (#260)

docs/source/zh/guided_tour.md

@@ -97,6 +97,7 @@ model = LiteLLMModel(
     model_id="ollama_chat/llama3.2", # 这个模型对于 agent 行为来说有点弱
     api_base="http://localhost:11434", # 如果需要可以替换为远程 open-ai 兼容服务器
     api_key="YOUR_API_KEY" # 如果需要可以替换为 API key
+    num_ctx=8192 # https://huggingface.co/spaces/NyxKrage/LLM-Model-VRAM-Calculator
 )
 
 agent = CodeAgent(tools=[], model=model, add_base_tools=True)

docs/source/zh/tutorials/tools.md

@@ -139,7 +139,7 @@ model = HfApiModel("Qwen/Qwen2.5-Coder-32B-Instruct")
 agent = CodeAgent(tools=[image_generation_tool], model=model)
 
 agent.run(
-    "Improve this prompt, then generate an image of it.", prompt='A rabbit wearing a space suit'
+    "Improve this prompt, then generate an image of it.", additional_args={'user_prompt': 'A rabbit wearing a space suit'}
 )
 ```