Typo correction

crates/bevy_ecs/src/system/query.rs

@@ -246,7 +246,7 @@ use std::{any::TypeId, borrow::Borrow, fmt::Debug};
 /// As iterators are in general more flexible and better integrated with the rest of the Rust ecosystem,
 /// it is advised to use `iter` methods over `for_each`.
 /// It is strongly advised to only use `for_each` if it tangibly improves performance:
-/// be sure profile or benchmark both before and after the change.
+/// be sure to profile or benchmark both before and after the change.
 ///
 /// [binomial coefficient]: https://en.wikipedia.org/wiki/Binomial_coefficient
 /// [`iter`]: Self::iter