Fix the CI to ignore a missing file

.github/workflows/rust.yml

@@ -124,4 +124,9 @@ jobs:
       - name: Cache dependencies
         uses: Swatinem/rust-cache@v2.2.0
       - name: Run cargo fmt
-        run: cargo fmt --all -- --check
+        # Since we never ran the `build.rs` script in the benchmark directory we are missing one auto-generated import file.
+        # Since we want to trigger (and fail) this action as fast as possible, instead of building the benchmark crate
+        # we are going to create an empty file where rustfmt expects it.
+        run: |
+          echo -ne "\n" > benchmarks/benches/datasets_paths.rs
+          cargo fmt --all -- --check