MAINTAINERS: add io_uring tool to IO_URING

The files in ./tools/io_uring/ are maintained by the IO_URING maintainers.
Reflect that fact in MAINTAINERS.

Signed-off-by: Lukas Bulwahn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: bulwahn

MAINTAINERS

@@ -9497,6 +9497,7 @@ F:	fs/io-wq.h
 F:	fs/io_uring.c
 F:	include/linux/io_uring.h
 F:	include/uapi/linux/io_uring.h
+F:	tools/io_uring/
 
 IPMI SUBSYSTEM
 M:	Corey Minyard <[email protected]>