fix: revert to gpt

Author: neagualexa

Diff for: src/agents/informational_agent/informational_agent.py

@@ -37,7 +37,7 @@ class State(TypedDict):
 
 class InformationalAgent:
     def __init__(self):
-        llm = GoogleAILLMs()
+        llm = OpenAILLMs()
         self.llm = llm.get_llm()
         summarisation_llm = OpenAILLMs()
         self.summarisation_llm = summarisation_llm.get_llm()