Merge pull request #1937 from hermit-os/dependabot/rust_toolchain/rust-toolchain-nightly-2025-09-15

build(deps): Bump rust-toolchain from nightly-2025-09-01 to nightly-2025-09-15

Author: mkroening

rust-toolchain.toml

@@ -1,5 +1,5 @@
 [toolchain]
-channel = "nightly-2025-09-01"
+channel = "nightly-2025-09-15"
 components = [
     "llvm-tools",
     "rust-src",