Automatic toolchain upgrade to nightly-2026-01-09

[github-actions]

Update Rust toolchain from nightly-2026-01-08 to nightly-2026-01-09 without any other source changes.

[github-actions]

This is an automatically generated pull request. If any of the CI checks fail,
manual intervention is required. In such a case, review the changes at
https://github.com/rust-lang/rust from
rust-lang/rust@fecb335 up to
rust-lang/rust@31cd367. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/31cd367b9c Auto merge of #148545 - cramertj:alloc-map, r=Amanieu Add allocator parameter to HashMap

rust-lang/rust@4586feb998 Auto merge of #150810 - matthiaskrgr:rollup-fXh6V3q, r=matthiaskrgr Rollup of 10 pull requests
rust-lang/rust@5a5740fb68 Rollup merge of #150789 - 2025-fix-vtable-for-comment, r=joboet
rust-lang/rust@0b98c6024b Rollup merge of #150787 - s390x-musl-co-maintainer, r=Noratrieb
rust-lang/rust@eaff06187f Rollup merge of #150736 - atomic-ptr-null, r=joboet
rust-lang/rust@7a11f8baee Rollup merge of #150717 - jobs, r=Kobzol
rust-lang/rust@219d95e9bc Rollup merge of #150694 - miri-check, r=clubby789,bjorn3
rust-lang/rust@3481c0d3cb Rollup merge of #150569 - check_static_initializer_acyclic, r=workingjubilee
rust-lang/rust@023cc3cacc Rollup merge of #150164 - fix-wasm-export-executable-symbols, r=jdonszelmann
rust-lang/rust@fc4464bf7b Rollup merge of #150094 - more-va-arg, r=workingjubilee
rust-lang/rust@b3f95da910 Rollup merge of #150074 - provider-doc-update, r=Mark-Simulacrum
rust-lang/rust@10ef3586d5 Rollup merge of #149976 - waker-fn, r=jhpratt
rust-lang/rust@32fe406b5e Auto merge of #150538 - Kobzol:dist-cg-gcc-component, r=jieyouxu Add a dist component for cg_gcc
rust-lang/rust@bca37a20bd Auto merge of #150798 - matthiaskrgr:rollup-ANxstUE, r=matthiaskrgr Rollup of 6 pull requests
rust-lang/rust@bfec56bfe0 Rollup merge of #150791 - w/mismatch, r=jieyouxu
rust-lang/rust@e8217318c6 Rollup merge of #150777 - stabilize_elem_offset, r=jhpratt
rust-lang/rust@40e95e5061 Rollup merge of #150757 - rm-unneded-test, r=bjorn3
rust-lang/rust@dadacb6589 Rollup merge of #150747 - fix/liloading-enzyme-err, r=lqd
rust-lang/rust@bb27147ba2 Rollup merge of #150696 - rm-FIXME, r=ZuseZ4
rust-lang/rust@db2ab90c05 Rollup merge of #150675 - mgca/tuple-expr, r=BoxyUwU
rust-lang/rust@598c7bde38 Auto merge of #150783 - Kobzol:bors-email-update, r=jieyouxu Update bors e-mail lookup
rust-lang/rust@a3b72d3de5 Fix copy-n-paste error in vtable_for docs
rust-lang/rust@600102c09b Add myself as co-maintainer for s390x-unknown-linux-musl
rust-lang/rust@548e586795 Auto merge of #150784 - Kobzol:rollup-0mvdoy5, r=Kobzol Rollup of 4 pull requests