chat_models.openai: Set tenacity timeout to openai's recommendation (#2768)

[OpenAI's
cookbook](https://github.com/openai/openai-cookbook/blob/main/examples/How_to_handle_rate_limits.ipynb)
suggest a tenacity backoff between 1 and 60 seconds. Currently
langchain's backoff is between 4 and 10 seconds, which causes frequent
timeout errors on my end.

This PR changes the timeout to the suggested values.

langchain/chat_models/openai.py

@@ -32,8 +32,8 @@ logger = logging.getLogger(__file__)
 def _create_retry_decorator(llm: ChatOpenAI) -> Callable[[Any], Any]:
     import openai
 
-    min_seconds = 4
-    max_seconds = 10
+    min_seconds = 1
+    max_seconds = 60
     # Wait 2^x * 1 second between each retry starting with
     # 4 seconds, then up to 10 seconds, then 10 seconds afterwards
     return retry(
@@ -199,8 +199,8 @@ class ChatOpenAI(BaseChatModel):
     def _create_retry_decorator(self) -> Callable[[Any], Any]:
         import openai
 
-        min_seconds = 4
-        max_seconds = 10
+        min_seconds = 1
+        max_seconds = 60
         # Wait 2^x * 1 second between each retry starting with
         # 4 seconds, then up to 10 seconds, then 10 seconds afterwards
         return retry(