CI: correct condition

.github/workflows/benchmark.yml

@@ -30,6 +30,6 @@ jobs:
         run: cargo bench -- --list
       - name: Run benchmarks with Criterion.rs
         run: cargo bench
-        if: runner.os == 'windows-latest'
+        if: matrix.os == 'windows-latest'
       - name: Track base branch benchmarks with Bencher
         run: bencher run --project iof --token '${{ secrets.BENCHER_API_TOKEN }}' --branch main --testbed '${{ matrix.os }}' --threshold-measure latency --threshold-test t_test --threshold-max-sample-size 64 --threshold-upper-boundary 0.99 --thresholds-reset --err --adapter rust_criterion --github-actions '${{ secrets.GITHUB_TOKEN }}' "cargo bench"