Change to 'may not' as the reviewer suggested

src/start/hardware.md

@@ -80,7 +80,7 @@ MEMORY
 ```
 > **NOTE**: If you for some reason changed the `memory.x` file after you had made
 > the first build of a specific build target, then do `cargo clean` before
-> `cargo build`, because `cargo build` does not track updates of `memory.x`.
+> `cargo build`, because `cargo build` may not track updates of `memory.x`.
 
 Make sure the `debug::exit()` call is commented out or removed, it is used
 only for running in QEMU.