Adjust vector number range in docs

Author: phil-opp

src/structures/idt.rs

@@ -340,7 +340,7 @@ pub struct InterruptDescriptorTable {
     /// vector nr. 20
     pub virtualization: Entry<HandlerFunc>,
 
-    /// vector nr. 21-29
+    /// vector nr. 21-28
     reserved_2: [Entry<HandlerFunc>; 8],
 
     /// The VMM Communication Exception (`#VC`) is always generated by hardware when an `SEV-ES`