Update Toolchain to 9/1 (#3478)

Updates toolchain to 9/1. This couldn't run automatically because of
#3476.

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under the terms of the Apache 2.0 and MIT licenses.

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2024-08-30"
+channel = "nightly-2024-09-01"
 components = ["llvm-tools", "rustc-dev", "rust-src", "rustfmt"]