Automatic toolchain upgrade to nightly-2026-01-12

[github-actions]

Update Rust toolchain from nightly-2026-01-11 to nightly-2026-01-12 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@f57eac1 up to
rust-lang/rust@b68e16c. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/b68e16cfc0 Auto merge of #150741 - petrochenkov:modsplitfast, r=nnethercote resolve: Use `Macros20NormalizedIdent` in more interfaces

rust-lang/rust@7c41ee66db Auto merge of #150932 - weihanglo:update-cargo, r=weihanglo Update cargo submodule
rust-lang/rust@1279939b38 Auto merge of #150957 - matthiaskrgr:rollup-Cf6MsNU, r=matthiaskrgr Rollup of 14 pull requests
rust-lang/rust@83924065f7 Rollup merge of #150942 - port_more_attrs, r=jdonszelmann
rust-lang/rust@c6cf1c3ab8 Rollup merge of #150930 - crate_level, r=jdonszelmann
rust-lang/rust@7fd7eecf1f Rollup merge of #150922 - subscribe-attr-parsing, r=Urgau
rust-lang/rust@3b1f270742 Rollup merge of #150918 - uefi-fs-seek, r=jhpratt
rust-lang/rust@cbdfa9167f Rollup merge of #150908 - llvm-f16-cfg, r=nikic
rust-lang/rust@55383badd3 Rollup merge of #150873 - reenable-gcc-download-ci, r=marcoieni
rust-lang/rust@98270a95ed Rollup merge of #150862 - uefi-fs-flush, r=the8472
rust-lang/rust@1a1a11368d Rollup merge of #150812 - bump-cargotest-diesel, r=Mark-Simulacrum
rust-lang/rust@57da460fc7 Rollup merge of #150781 - pr/cleanup-rand-usages, r=Mark-Simulacrum
rust-lang/rust@cf4ad6bf68 Rollup merge of #150776 - connect_error-fbsd15, r=Mark-Simulacrum
rust-lang/rust@ea14ce5ca2 Rollup merge of #150743 - docs/iterator, r=Mark-Simulacrum
rust-lang/rust@7a9ef99a56 Rollup merge of #150668 - stdio-swap, r=Mark-Simulacrum,RalfJung
rust-lang/rust@f417f55e62 Rollup merge of #150368 - minicore-ordering, r=workingjubilee
rust-lang/rust@30f9939a0c Rollup merge of #148941 - stabilize-map-if, r=jhpratt
rust-lang/rust@08f833aa17 Auto merge of #150540 - JonathanBrouwer:incremental_test, r=cjgillot Also hash spans inside the same file as relative (V2)
rust-lang/rust@9bc8b40bc3 Auto merge of #150951 - Zalathar:rollup-xhWLriD, r=Zalathar Rollup of 12 pull requests
rust-lang/rust@c6a3792972 Rollup merge of #150916 - eii-test-reorg, r=jieyouxu
rust-lang/rust@1987b15908 Rollup merge of #150913 - eii-macro-attrs, r=jdonszelmann
rust-lang/rust@c2448d7311 Rollup merge of #150911 - master, r=Kivooeo
rust-lang/rust@5b685d7b03 Rollup merge of #150878 - bpf_staticlib_error, r=Urgau
rust-lang/rust@72c9c8c801 Rollup merge of #150871 - simplify-partialord-doc, r=jhpratt
rust-lang/rust@ebd5d75dbc Rollup merge of #150852 - uefi-fs-write, r=joboet
rust-lang/rust@26da51d2a0 Rollup merge of #150804 - std_detect_less_features, r=tgross35
rust-lang/rust@e25d7a898a Rollup merge of #150799 - mcga, r=BoxyUwU
rust-lang/rust@8a5c66efb9 Rollup merge of #150788 - thir-pat, r=Nadrieril
rust-lang/rust@30585ebbd3 Rollup merge of #150494 - extern_linkage_dso_local, r=bjorn3
rust-lang/rust@dda4963edb Rollup merge of #148196 - std-fs-iterative-create-dir-all, r=Mark-Simulacrum,jhpratt
rust-lang/rust@c680b74a33 Rollup merge of #150947 - partial-sort-miri, r=tgross35
rust-lang/rust@50813939e4 Don't run the longer partial-sort tests under Miri
rust-lang/rust@76fcac2371 Port #[rustc_has_incoherent_inherent_impls] to attribute parser
rust-lang/rust@ad04f76d84 Auto merge of #150912 - matthiaskrgr:rollup-SHXgjYS, r=matthiaskrgr Rollup of 11 pull requests