Update datafusion/src/physical_optimizer/pruning.rs

Co-authored-by: Nga Tran <nga-tran@live.com>

Author: alamb

datafusion/src/physical_optimizer/pruning.rs

@@ -59,7 +59,7 @@ use crate::{
 ///
 /// ```text
 /// min_values("a") -> Some([5, Null, 20])
-/// max_values("a") -> Some([20, Null, 30])
+/// max_values("a") -> Some([10, Null, 30])
 /// min_values("some_other_column") -> None
 /// ```
 pub trait PruningStatistics {