Automatic toolchain upgrade to nightly-2025-08-15

[github-actions]

Update Rust toolchain from nightly-2025-08-14 to nightly-2025-08-15 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@3672a55 up to
rust-lang/rust@898aff7. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/898aff704d Auto merge of #145085 - JonathanBrouwer:target_checking, r=jdonszelmann

rust-lang/rust@4bb7bf64e0 Update uitests
rust-lang/rust@5245c39972 Remove the old target checking logic
rust-lang/rust@35e04b67a6 Specify the list of allowed targets per attribute
rust-lang/rust@744d39ebe6 Allow attribute parsers to specify a list of allowed targets
rust-lang/rust@e7ef23e90e Pass the target type down to parse_attribute_list
rust-lang/rust@106731f714 Improved Target type
rust-lang/rust@be00ea1968 Auto merge of #144542 - sayantn:stabilize-sse4a-tbm, r=Amanieu,traviscross
rust-lang/rust@30017c36d6 Auto merge of #145388 - GuillaumeGomez:rollup-hnlt5ov, r=GuillaumeGomez
rust-lang/rust@762b7ecdb0 Rollup merge of #145372 - petrochenkov:noresmacpath, r=jackh726
rust-lang/rust@707e956946 Rollup merge of #145361 - xizheyin:145294, r=compiler-errors
rust-lang/rust@44d3217c20 Rollup merge of #145323 - scrabsha:push-pqwvmznzzmpr, r=jdonszelmann
rust-lang/rust@f493f804d7 Rollup merge of #145299 - eval-exec:exec-fix-145293, r=tgross35
rust-lang/rust@ad21c6d898 Rollup merge of #145266 - camsteffen:reduce-queries, r=petrochenkov
rust-lang/rust@952584942c Rollup merge of #145250 - fmease:regr-test-for-attr-meta-ice, r=jdonszelmann
rust-lang/rust@c1f9e2ab50 Rollup merge of #145179 - joshtriplett:number, r=RalfJung
rust-lang/rust@7d91d20df1 Rollup merge of #144959 - Marcondiro:master, r=Mark-Simulacrum
rust-lang/rust@6ac5c28412 Rollup merge of #144727 - Stypox:add-tracing-to-resolve, r=RalfJung
rust-lang/rust@31d8277abe Rollup merge of #144515 - scottmcm:ptr_cast_array, r=Mark-Simulacrum
rust-lang/rust@4bc1eb737d Rollup merge of #142741 - a1phyr:fix_unsoundness, r=Mark-Simulacrum
rust-lang/rust@90a5e62b87 Rollup merge of #142372 - Urgau:improve-remap_path_prefix-doc, r=wesleywiser
rust-lang/rust@f676dd8729 Rollup merge of #140434 - a4lg:rustdoc-multi-footnote-refs, r=fmease,GuillaumeGomez
rust-lang/rust@9b797b9f7a resolve: Improve code reuse in typo candidate collection
rust-lang/rust@d682943396 resolve: Do not show deprecated helper attributes in typo recommendations
rust-lang/rust@51eb5ed8f0 resolve: Do not call resolve_macro_path from late resolution
rust-lang/rust@74aca53f55 rustdoc: Allow multiple references to a single footnote
rust-lang/rust@2c1ac85679 Auto merge of #145131 - Kobzol:bootstrap-clippy, r=jieyouxu
rust-lang/rust@8e7795415a Auto merge of #144793 - petrochenkov:extprel3, r=davidtwco