docs: Fix ChatBaichuan, QianfanChatEndpoint, ChatSparkLLM, ChatZhipuAI docs (#25265)

- **Description:** Fix some chat models docs, include:
  - ChatBaichuan
  - QianfanChatEndpoint
  - ChatSparkLLM
  - ChatZhipuAI

libs/community/langchain_community/chat_models/baichuan.py

@@ -206,7 +206,7 @@ class ChatBaichuan(BaseChatModel):
 
     Key init args — client params:
         api_key: Optional[str]
-            MiniMax API key. If not passed in will be read from env var BAICHUAN_API_KEY.
+            Baichuan API key. If not passed in will be read from env var BAICHUAN_API_KEY.
         base_url: Optional[str]
             Base URL for API requests.
 

libs/community/langchain_community/chat_models/baidu_qianfan_endpoint.py

@@ -200,7 +200,7 @@ class QianfanChatEndpoint(BaseChatModel):
                 ("system", "你是一名专业的翻译家，可以将用户的中文翻译为英文。"),
                 ("human", "我喜欢编程。"),
             ]
-            qianfan_chat.invoke(message)
+            qianfan_chat.invoke(messages)
 
         .. code-block:: python
 
@@ -219,6 +219,7 @@ class QianfanChatEndpoint(BaseChatModel):
 
         .. code-block:: python
 
+            stream = chat.stream(messages)
             full = next(stream)
             for chunk in stream:
                 full += chunk

libs/community/langchain_community/chat_models/sparkllm.py

@@ -126,9 +126,9 @@ class ChatSparkLLM(BaseChatModel):
 
             from langchain_community.chat_models import ChatSparkLLM
 
-            chat = MiniMaxChat(
-                api_key=api_key,
-                api_secret=ak,
+            chat = ChatSparkLLM(
+                api_key="your-api-key",
+                api_secret="your-api-secret",
                 model='Spark4.0 Ultra',
                 # temperature=...,
                 # other params...

libs/community/langchain_community/chat_models/zhipuai.py

@@ -199,7 +199,7 @@ class ChatZhipuAI(BaseChatModel):
 
     Key init args — completion params:
         model: Optional[str]
-            Name of OpenAI model to use.
+            Name of ZhipuAI model to use.
         temperature: float
             Sampling temperature.
         max_tokens: Optional[int]
@@ -207,9 +207,9 @@ class ChatZhipuAI(BaseChatModel):
 
     Key init args — client params:
         api_key: Optional[str]
-        ZhipuAI API key. If not passed in will be read from env var ZHIPUAI_API_KEY.
+            ZhipuAI API key. If not passed in will be read from env var ZHIPUAI_API_KEY.
         api_base: Optional[str]
-        Base URL for API requests.
+            Base URL for API requests.
 
     See full list of supported init args and their descriptions in the params section.
 
@@ -255,7 +255,7 @@ class ChatZhipuAI(BaseChatModel):
 
         .. code-block:: python
 
-            stream = llm.stream(messages)
+            stream = zhipuai_chat.stream(messages)
             full = next(stream)
             for chunk in stream:
                 full += chunk