Automatic toolchain upgrade to nightly-2025-10-06

[github-actions]

Update Rust toolchain from nightly-2025-10-05 to nightly-2025-10-06 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@2cb4e7d up to
rust-lang/rust@8392220. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/839222065a Auto merge of #147384 - workingjubilee:rollup-2qqqfn4, r=workingjubilee

rust-lang/rust@0d3e4d1c2c Rollup merge of #147376 - jieyouxu:bootstrap-compiler-rt-self-test, r=Kobzol
rust-lang/rust@aa37ad40d5 Rollup merge of #147374 - jieyouxu:bootstrap-redirect-pages, r=Kobzol
rust-lang/rust@23d1cc7c52 Rollup merge of #147332 - Shunpoco:fast-spellcheck, r=Kobzol
rust-lang/rust@d8fc465bbb Rollup merge of #147327 - Zalathar:inherent, r=workingjubilee
rust-lang/rust@981353ca16 Auto merge of #147345 - Kivooeo:tidy-flt-fix, r=Kobzol
rust-lang/rust@bcbbdcb852 Auto merge of #147371 - Zalathar:rollup-897uitw, r=Zalathar
rust-lang/rust@a8b9a57674 bootstrap: relax compiler-rt root assertion
rust-lang/rust@7ed476f51f bootstrap: don't build redirect pages during dry-run/test
rust-lang/rust@21b5d6bd86 Rollup merge of #147369 - Noratrieb:avr-metadata, r=jieyouxu
rust-lang/rust@94e04993a1 Rollup merge of #147367 - chenyukang:yukang-trivial-cleanup, r=jieyouxu
rust-lang/rust@c8407194f9 Rollup merge of #147364 - ZuseZ4:update-autodiff-tests, r=jieyouxu
rust-lang/rust@d97e346ac7 Rollup merge of #147262 - JonathanBrouwer:fix-link, r=jieyouxu
rust-lang/rust@cc1a80629f Rollup merge of #144908 - GuillaumeGomez:fix-doctest-output-json, r=fmease
rust-lang/rust@9ccaf080cb Fill out AVR target metadata
rust-lang/rust@95445f9b96 Trivial code cleanup in resolve
rust-lang/rust@7c8fe29fd6 solve autodiffv2.rs FIXME and make identical_fnc test more robust
rust-lang/rust@e2c96cc06b Auto merge of #147363 - Zalathar:rollup-d9kd06g, r=Zalathar
rust-lang/rust@a0a4905723 Rollup merge of #147349 - saethlin:panic-immediate-advice, r=Noratrieb
rust-lang/rust@80759350c7 Rollup merge of #147337 - ada4a:write-diag-item, r=fmease
rust-lang/rust@56c96aebfc Rollup merge of #147328 - EFanZh:lock-with, r=joboet
rust-lang/rust@cae84c695a Rollup merge of #147320 - chenyukang:yukang-fix-147303-fn-arg, r=jieyouxu
rust-lang/rust@620ffe6595 Rollup merge of #147310 - Jules-Bertholet:maybe-incorrect-pattern-typo, r=chenyukang
rust-lang/rust@ff86a7db83 Rollup merge of #147309 - alexcrichton:wasm-unwinding-docs, r=jieyouxu
rust-lang/rust@59982f9a29 Rollup merge of #147288 - Zalathar:directive, r=jieyouxu
rust-lang/rust@33c99a0468 Use new DirectiveLine features in directive parsing
rust-lang/rust@6783e9465b Allow easy extraction of name/value from a DirectiveLine
rust-lang/rust@757d98ce2b Move DirectiveLine into its own submodule
rust-lang/rust@227ac7c3cd Auto merge of #147293 - nnethercote:avoid-dep_dep_node, r=saethlin