Install Rust explicitly in CI

Author: lorisleiva

.github/workflows/main.yml

@@ -44,6 +44,11 @@ jobs:
       - name: Git checkout
         uses: actions/checkout@v4
 
+      - name: Install Rust Toolchain and Components
+        uses: dtolnay/rust-toolchain@master
+        with:
+          components: clippy, rustfmt
+
       - name: Install Solana ${{ env.SOLANA_VERSION }}
         uses: solana-program/actions/install-solana@v1
         with: