Automatic toolchain upgrade to nightly-2025-11-20

[github-actions]

Update Rust toolchain from nightly-2025-11-19 to nightly-2025-11-20 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@3d461af up to
rust-lang/rust@07bdbae. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/07bdbaedc6 Auto merge of #149054 - oli-obk:min-encode, r=fee1-dead

rust-lang/rust@140044cffa Auto merge of #149085 - matthiaskrgr:rollup-f8ia15e, r=matthiaskrgr
rust-lang/rust@fd88e61fc9 Rollup merge of #149082 - ZuseZ4:autodiff-unstable-book-fmt, r=chenyukang
rust-lang/rust@48fa9138c3 Rollup merge of #148798 - tamird:esc-single-quote, r=Amanieu
rust-lang/rust@8b7479003b Rollup merge of #148797 - sorairolake:feature/non-zero-uint-bit-width, r=scottmcm
rust-lang/rust@3732c3c068 Rollup merge of #148201 - ZuseZ4:autodiff-activity-docs, r=oli-obk
rust-lang/rust@714f1cea15 Rollup merge of #147521 - sayantn:simd-const-intrinsics, r=madsmtm
rust-lang/rust@2cc5bf7b6a Rollup merge of #147421 - Kivooeo:ice-fix51621, r=chenyukang
rust-lang/rust@847c422cea Rollup merge of #147171 - Qelxiros:hashmap_diag, r=fee1-dead
rust-lang/rust@a591113c0a Auto merge of #149037 - alexcrichton:update-wasi-sdk, r=jieyouxu
rust-lang/rust@6159a44067 Auto merge of #148434 - oli-obk:inherent-const-impl, r=fee1-dead
rust-lang/rust@7c2c3c0ded Auto merge of #149063 - matthiaskrgr:rollup-6z23izv, r=matthiaskrgr