Update examples/typescript-simplechat/readme.md

Co-authored-by: Bruce MacDonald <brucewmacdonald@gmail.com>

examples/typescript-simplechat/readme.md

 # Simple Chat Example
 
-The **chat** endpoint is one of two ways to generate text from an LLM with Ollama. At a high level you provide the endpoint an array of objects with a role and content specified. Then with each output and prompt, you add more of those role/content objects, which builds up the history.
+The **chat** endpoint is one of two ways to generate text from an LLM with Ollama. At a high level you provide the endpoint an array of message objects with a role and content specified. Then with each output and prompt, you add more messages, which builds up the history.
 
 ## Review the Code