Doc: openai_functions_agent.mdx import (#10282)

Fix the import in docmention

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Co-authored-by: Bagatur <baskaryan@gmail.com>

docs/snippets/modules/agents/agent_types/openai_functions_agent.mdx

@@ -5,10 +5,12 @@ pip install openai google-search-results
 ```
 
 ```python
-from langchain import LLMMathChain, OpenAI, SerpAPIWrapper, SQLDatabase, SQLDatabaseChain
-from langchain.agents import initialize_agent, Tool
-from langchain.agents import AgentType
+from langchain.agents import initialize_agent, AgentType, Tool
+from langchain.chains import LLMMathChain
 from langchain.chat_models import ChatOpenAI
+from langchain.llms import OpenAI
+from langchain.utilities import SerpAPIWrapper, SQLDatabase
+from langchain_experimental.sql import SQLDatabaseChain
 ```