Crubit OSS build presubmit: Bump the rust toolchain version.

PiperOrigin-RevId: 571360182
Change-Id: I2d66d88f45f230a90eba93f4dc66b5d0fea3036b
diff --git a/WORKSPACE b/WORKSPACE
index cba83e1..29389e7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -57,7 +57,7 @@
 
 rules_rust_dependencies()
 
-RUST_TOOLCHAIN_VERSION = "nightly/2023-09-06"
+RUST_TOOLCHAIN_VERSION = "nightly/2023-10-01"
 
 rust_register_toolchains(
     allocator_library = "@//common:rust_allocator_shims",