docs: replace initialize_agent with create_react_agent in searchapi - replace deprecated load_tools

docs/docs/integrations/providers/searchapi.mdx

@@ -73,7 +73,7 @@ You can also easily load this wrapper as a Tool (to use with an Agent).
 You can do this with:
 
 ```python
-from langchain.agents import load_tools
+from langchain_community.agent_toolkits.load_tools import load_tools
 tools = load_tools(["searchapi"])
 ```