Update crates/bevy_ecs/src/ptr.rs

Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com>

crates/bevy_ecs/src/ptr.rs

@@ -37,7 +37,7 @@ pub struct PtrMut<'a>(NonNull<u8>, PhantomData<&'a mut u8>);
 /// - The lifetime `'a` accurately represents how long the pointer is valid for.
 ///
 /// It may be helpful to think of this type as similar to `&'a mut ManuallyDrop<dyn Any>` but
-/// without the metadata and able to point to data that does not correspond to a rust type.
+/// without the metadata and able to point to data that does not correspond to a Rust type.
 pub struct OwningPtr<'a>(NonNull<u8>, PhantomData<&'a mut u8>);
 
 macro_rules! impl_ptr {