ci: use nightly-2025-12-05

Signed-off-by: Jun Kimura <junkxdev@gmail.com>

Author: bluele

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
-          toolchain: nightly-2025-12-06
+          toolchain: nightly-2025-12-05
           components: rust-src, rustfmt, clippy
       - run: cargo install taplo-cli --version 0.10.0 --locked
       - run: cargo install --path ./cargo-sgx --locked