python3-setuptools-rust: upgrade 1.11.1 -> 1.12.0

python3-setuptools-rust: upgrade 1.11.1 -> 1.12.0

1.12.0 (2025-08-29)

* Set PYO3_BUILD_EXTENSION_MODULE environment variable when building
PyO3 extensions. #540

https://github.com/PyO3/setuptools-rust/blob/main/CHANGELOG.md#1120-2025-08-29

Reference:
https://github.com/PyO3/setuptools-rust/pull/540

Comparing Changes:
https://github.com/PyO3/setuptools-rust/compare/v1.11.1...v1.12.0

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>