Addresses typo and clarifiction in comments (#191)

Minor changes include a typo fixed and enhancing
an example for using OpenAI as an agent model with Ollama
via langchain

Resolves #189 #190

README.md

@@ -70,11 +70,13 @@ researcher = Agent(
   tools=[search_tool]
   # You can pass an optional llm attribute specifying what mode you wanna use.
   # It can be a local model through Ollama / LM Studio or a remote
-  # model like OpenAI, Mistral, Antrophic of others (https://python.langchain.com/docs/integrations/llms/)
+  # model like OpenAI, Mistral, Antrophic or others (https://python.langchain.com/docs/integrations/llms/)
   #
   # Examples:
   # llm=ollama_llm # was defined above in the file
-  # llm=ChatOpenAI(model_name="gpt-3.5", temperature=0.7)
+  # llm=OpenAI(model_name="gpt-3.5", temperature=0.7)
+  # For the OpenAI model you would need to import
+  # from langchain_openai import OpenAI
 )
 writer = Agent(
   role='Tech Content Strategist',