MAINTAINERS: add configfs Rust abstractions

Add rust files to configfs MAINTAINERS entry.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Hindborg <[email protected]>

Author: Andreas Hindborg

MAINTAINERS

@@ -5975,7 +5975,9 @@ S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/a.hindborg/linux.git configfs-next
 F:	fs/configfs/
 F:	include/linux/configfs.h
+F:	rust/kernel/configfs.rs
 F:	samples/configfs/
+F:	samples/rust/rust_configfs.rs
 
 CONGATEC BOARD CONTROLLER MFD DRIVER
 M:	Thomas Richard <[email protected]>