Update src/idiomatic/leveraging-the-type-system.md

Co-authored-by: Dmitri Gribenko <[email protected]>

Author: LukeMathWalker

src/idiomatic/leveraging-the-type-system.md

@@ -35,7 +35,7 @@ Additional items speaker may mention:
   types in Rust.
 
   Evaluate, on a case-by-case basis, whether a more imperative approach may be
-  easier to implement, relying on Rust's borrow-checker and type system to
+  easier to implement. Consider using in-place mutation, relying on Rust's borrow-checker and type system to
   control what can be mutated, and where.
 
 - The same caution should be applied to object-oriented design patterns. Rust