Improved example [skip ci]

ankane · ankane · commit 2ba2a855164f · 2025-02-08T20:00:48.000-08:00
diff --git a/README.md b/README.md
@@ -376,7 +376,7 @@ Also supports `sum`
 Add an approximate index
 
 ```python
-from sqlalchemy import Index
+from sqlmodel import Index
 
 index = Index(
     'my_index',
