Update README.md (#506)

Co-authored-by: Chi Wang <[email protected]>

Author: AaadityaG

README.md

@@ -42,7 +42,7 @@ The easiest way to start playing is
 
     [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/microsoft/autogen?quickstart=1)
 
- 2. Copy OAI_CONFIG_LIST_sample to /notebook folder, name to OAI_CONFIG_LIST, and set the correct config.
+ 2. Copy OAI_CONFIG_LIST_sample to /notebook folder, name to OAI_CONFIG_LIST, and set the correct configuration.
  3. Start playing with the notebooks!