Automatic toolchain upgrade to nightly-2025-10-17

[github-actions]

Update Rust toolchain from nightly-2025-10-16 to nightly-2025-10-17 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@57ef8d6 up to
rust-lang/rust@53a741f. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/53a741fc4b Auto merge of #147782 - matthiaskrgr:rollup-9728xqu, r=matthiaskrgr

rust-lang/rust@f337e28bd9 Rollup merge of #147773 - timvisee:docs-empty-is-ascii, r=Noratrieb
rust-lang/rust@3a993f7458 Rollup merge of #147752 - fee1-dead-contrib:sgtypo, r=chenyukang
rust-lang/rust@7604d12e05 Rollup merge of #147751 - nnethercote:bit_set-Word, r=Zalathar
rust-lang/rust@6f66f3baf5 Rollup merge of #147744 - RalfJung:miri, r=RalfJung
rust-lang/rust@d8dd468ff1 Rollup merge of #147738 - pommicket:issue-147665, r=madsmtm
rust-lang/rust@42cf0bd006 Rollup merge of #147732 - h3nryc0ding:master, r=chenyukang
rust-lang/rust@5408ec3069 Rollup merge of #147576 - Mark-Simulacrum:fix-offset-zst, r=nnethercote,RalfJung
rust-lang/rust@91f48d8ba7 Rollup merge of #147000 - moturus:motor-os_stdlib_pr, r=tgross35
rust-lang/rust@334b3af42c Rollup merge of #144438 - dawidl022:contracts/guarded-lowering, r=oli-obk
rust-lang/rust@779e19d8ba Auto merge of #147644 - cjgillot:bitsetvec, r=jackh726
rust-lang/rust@7a11c72db0 is_ascii on an empty string or slice returns true
rust-lang/rust@f5242367f4 Auto merge of #146221 - camsteffen:ast-boxes, r=cjgillot
rust-lang/rust@74ac3ec91a style-guide: fix typo for empty struct advice
rust-lang/rust@402ce0ef07 Auto merge of #147745 - matthiaskrgr:rollup-b4kftk9, r=matthiaskrgr