Automatic toolchain upgrade to nightly-2024-09-25 (#3547)

Update Rust toolchain from nightly-2024-09-23 to nightly-2024-09-25
without any other source changes.

We skip over 2024-09-24 as that version ICEs when trying to build
http-body (fixed by rust-lang/rust#130775).

---------

Co-authored-by: celinval <35149715+celinval@users.noreply.github.com>
Co-authored-by: Michael Tautschnig <tautschn@amazon.com>

Author: 3 people

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2024-09-23"
+channel = "nightly-2024-09-25"
 components = ["llvm-tools", "rustc-dev", "rust-src", "rustfmt"]