vfs: add Rust files to MAINTAINERS

These files are maintained by the VFS subsystem, thus add them to the
relevant MAINTAINERS entry to ensure that the maintainers are ccd on
relevant changes.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/20250715075140.3174832-1-aliceryhl@google.com
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: Darksonn

MAINTAINERS

@@ -9242,6 +9242,10 @@ F:	include/linux/fs.h
 F:	include/linux/fs_types.h
 F:	include/uapi/linux/fs.h
 F:	include/uapi/linux/openat2.h
+F:	rust/kernel/fs.rs
+F:	rust/kernel/fs/
+F:	rust/kernel/seq_file.rs
+F:	rust/kernel/sync/poll.rs
 F:	Documentation/driver-api/early-userspace/buffer-format.rst
 F:	init/do_mounts*
 F:	init/*initramfs*