MAINTAINERS: add entry for the Rust num module

This new module provides numerical features useful for the kernel, such
as the `Integer` trait and the `Bounded` integer wrapper.

Signed-off-by: Alexandre Courbot <[email protected]>
Acked-by: Yury Norov (NVIDIA) <[email protected]>
Reviewed-by: Alice Ryhl <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Miguel Ojeda <[email protected]>

Author: Gnurou

MAINTAINERS

@@ -22520,6 +22520,14 @@ T:	git https://github.com/Rust-for-Linux/linux.git alloc-next
 F:	rust/kernel/alloc.rs
 F:	rust/kernel/alloc/
 
+RUST [NUM]
+M:	Alexandre Courbot <[email protected]>
+R:	Yury Norov <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	rust/kernel/num.rs
+F:	rust/kernel/num/
+
 RUST [PIN-INIT]
 M:	Benno Lossin <[email protected]>
 L:	[email protected]