Properly document safety concerns

ctru-rs/src/applets/error.rs

@@ -82,7 +82,9 @@ impl PopUp {
 /// Sets a custom panic hook that uses the error applet to display panic messages. You can also choose to have
 /// messages printed over stderr along with the pop-up display.
 ///
-/// SAFETY: The error applet requires that both the [`Apt`] and [`Gfx`] services are active whenever it launches.
+/// # Safety
+///
+/// The error applet requires that both the [`Apt`] and [`Gfx`] services are active whenever it launches.
 /// By calling this function, you promise that you will keep those services alive until either the program ends or
 /// you unregister this hook with [`std::panic::take_hook`](https://doc.rust-lang.org/std/panic/fn.take_hook.html).
 pub unsafe fn set_panic_hook(use_stderr: bool) {