fix small documentation bug

src/context/mod.rs

@@ -1,6 +1,6 @@
-//! Context management
-//! https://en.wikipedia.org/wiki/Context_switch
-//! https://wiki.osdev.org/Context_Switching
+//! # Context management
+//! 
+//! For resources on contexts, please consult [wikipedia](https://en.wikipedia.org/wiki/Context_switch) and  [osdev](https://wiki.osdev.org/Context_Switching)
 use alloc::boxed::Box;
 use core::alloc::{Alloc, GlobalAlloc, Layout};
 use core::sync::atomic::Ordering;