docs/zh_CN: Update rust/arch-support.rst translation

Update Documentation/rust/arch-support.rst translation.

Update the translation through commit 3f70ebe638
("s390: Enable Rust support")

Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Ben Guo <ben.guo@openatom.club>
Signed-off-by: Alex Shi <alexs@kernel.org>

Documentation/translations/zh_CN/rust/arch-support.rst

@@ -23,6 +23,7 @@
 ``arm64``      Maintained        仅小端序。
 ``loongarch``  Maintained        \-
 ``riscv``      Maintained        仅 ``riscv64``，且仅限 LLVM/Clang。
+``s390``       Maintained        必须禁用 ``CONFIG_EXPOLINE``。
 ``um``         Maintained        \-
 ``x86``        Maintained        仅 ``x86_64``。
 =============  ================  ==============================================