Update import LangchainCallbackHandler in documentation (#927)

Update import LangchainCallbackHandler

Author: pavalucas

README.md

@@ -315,7 +315,7 @@ To use the handler, import and set
 import os
 from langchain.chat_models import ChatOpenAI
 from langchain.agents import initialize_agent, AgentType
-from agentops.partners.langchain_callback_handler import LangchainCallbackHandler
+from agentops.integration.callbacks.langchain import LangchainCallbackHandler
 
 AGENTOPS_API_KEY = os.environ['AGENTOPS_API_KEY']
 handler = LangchainCallbackHandler(api_key=AGENTOPS_API_KEY, tags=['Langchain Example'])

docs/v1/integrations/langchain.mdx

@@ -30,7 +30,7 @@ AgentOps works seamlessly with applications built using LangChain.
 			import os
 			from langchain.chat_models import ChatOpenAI
 			from langchain.agents import initialize_agent, AgentType
-			from agentops.langchain_callback_handler import LangchainCallbackHandler
+			from agentops.integration.callbacks.langchain import LangchainCallbackHandler
 			```
 		</CodeGroup>
 	</Step>
@@ -84,7 +84,7 @@ AgentOps works seamlessly with applications built using LangChain.
 	import os
 	from langchain.chat_models import ChatOpenAI
 	from langchain.agents import initialize_agent, AgentType
-	from agentops.langchain_callback_handler import LangchainCallbackHandler
+	from agentops.integration.callbacks.langchain import LangchainCallbackHandler
 
 	handler = LangchainCallbackHandler(api_key=AGENTOPS_API_KEY, tags=['LangChain Example'])
 

docs/v1/usage/langchain-callback-handler.mdx

@@ -43,7 +43,7 @@ properly include `instrument_llm_calls=False`. In this case, call
 
 Initialize the handler with its constructor and pass it into the callbacks array from LangChain.
 ```python
-from agentops.langchain_callback_handler import LangchainCallbackHandler
+from agentops.integration.callbacks.langchain import LangchainCallbackHandler
 ChatOpenAI(callbacks=[LangchainCallbackHandler()])
 ```