bump pipeline to nightly

Author: alphastrata

.github/workflows/rust.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@nightly
         with:
           targets: x86_64-unknown-linux-gnu
       - name: install dependencies