update rust version in CI

Author: colinlyguo

.github/workflows/prover.yml

@@ -48,7 +48,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: nightly-2023-12-03
+          toolchain: nightly-2024-12-03
           components: rustfmt
       - name: Cargo cache
         uses: Swatinem/rust-cache@v2