Fix CI: use actions-rs/toolchain for Rust setup

Author: Cod-e-Codes

.github/workflows/ci.yml

@@ -22,9 +22,10 @@ jobs:
         run: |
           python -m py_compile pytools/summary.py
       - name: Set up Rust
-        uses: actions/setup-rust@v1
+        uses: actions-rs/toolchain@v1
         with:
-          rust-version: 'stable'
+          toolchain: stable
+          override: true
       - name: Build Rust parser
         run: |
           cd parser && cargo build --release