Faster benchmark CI job

Author: blopker

.github/workflows/ci.yml

@@ -19,10 +19,8 @@ jobs:
       - uses: actions/checkout@v4
       - name: install Rust stable
         uses: dtolnay/rust-toolchain@stable
-      - name: Build
-        run: cargo build --release
       - name: Run benchmark
-        run: ./target/release/codebook --benchmark
+        run: make benchmark
   test:
     name: Test
     runs-on: ubuntu-latest