Update src/daft-core/src/array/list_array.rs

Co-authored-by: Jay Chia <[email protected]>

src/daft-core/src/array/list_array.rs

@@ -13,7 +13,7 @@ pub struct ListArray {
     pub field: Arc<Field>,
     pub flat_child: Series,
 
-    /// Where does each row start
+    /// Where each row starts and ends. Null rows usually have the same start/end index, but this is not guaranteed.
     offsets: arrow2::offset::OffsetsBuffer<i64>,
     validity: Option<arrow2::bitmap::Bitmap>,
 }