fix: Match e2e test Python client pause to the Typescript one

Author: clareliguori

e2e_tests/python/chat_session.py

@@ -69,8 +69,8 @@ async def start(self) -> None:
 
             for i, user_input in enumerate(self.user_utterances):
                 if i != 0:
-                    print("\n**Pausing 15 seconds to avoid Bedrock throttling**")
-                    await asyncio.sleep(15)
+                    print("\n**Pausing 30 seconds to avoid Bedrock throttling**")
+                    await asyncio.sleep(30)
 
                 print(f"\nYou: {user_input}")