fix path to benchmarks

Author: ev-br

.github/workflows/codspeed-bench.yml

@@ -165,7 +165,8 @@ jobs:
           python -c'import _flapack; print(dir(_flapack))'
           python -c 'import openblas_wrap as o; print(f"{o.__file__ = }")'
           pip install pytest-benchmark
-          pytest benchmarks/bench_blas.py
+          ls -l {{ github.workspace }}/benchmark/pybench/benchmarks/
+          pytest {{ github.workspace }}/benchmark/pybench/benchmarks/bench_blas.py
 
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v2