MAINTAINERS: add Tamir Duberstein as Rust reviewer

Tamir has been involved with the Rust for Linux project for more than
a year and a half now. He has been working on improving the integration
between the kernel and the Rust language and tooling: he led the effort
to replace the kernel's own `CStr` type with the standard library's,
and reworked the rust-analyzer integration, among other things.

He is already the maintainer of the `RUST [RUST-ANALYZER]` and `XARRAY API
[RUST]` entries. In addition, he has been active reviewing Rust code in
the mailing list.

He is also a long-time contributor to the upstream Rust project, including
on topics that matter for the Linux kernel [1].

His expertise with the language and its tooling will be very useful to
have around in the future. Thus add him to the `RUST` entry as reviewer.

Link: rust-lang/rust#139994 [1]
Acked-by: Tamir Duberstein <tamird@kernel.org>
Acked-by: Gary Guo <gary@garyguo.net>
Link: https://patch.msgid.link/20260611055538.61425-2-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

MAINTAINERS

@@ -23394,6 +23394,7 @@ R:	Alice Ryhl <aliceryhl@google.com>
 R:	Trevor Gross <tmgross@umich.edu>
 R:	Danilo Krummrich <dakr@kernel.org>
 R:	Daniel Almeida <daniel.almeida@collabora.com>
+R:	Tamir Duberstein <tamird@kernel.org>
 L:	rust-for-linux@vger.kernel.org
 S:	Supported
 W:	https://rust-for-linux.com