Update README.md

Fix instructions which lead to `Undefined variable: g:vim_ai_chat` if config options are not initially set

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index 993e762..5d7f26c 100644
--- a/README.md
+++ b/README.md
@@ -199,7 +199,7 @@ let g:vim_ai_chat = {
 \}
 ```
 
-Or modify options directly during the vim session:
+Once the above is set, you can modify options directly during the vim session:
 
 ```vim
 let g:vim_ai_chat['options']['model'] = 'gpt-4'