chore(rust): bump nightly to 1.94.0 (2026-03-05)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Boshen

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # Needed nightly features:
 # - cargo `Z-bindeps` to build and embed preload shared libraries as dependencies of fspy
 # - `windows_process_extensions_main_thread_handle` to get the main thread handle for Detours injection
-channel = "nightly-2025-12-11"
+channel = "nightly-2026-03-05"
 profile = "default"