Change execution path of plot.py

Author: jolly-chen

.github/workflows/soa-benchmark.yml

@@ -14,7 +14,9 @@ jobs:
           cmake -B ${{github.workspace}}/build
           cmake --build ${{github.workspace}}/build
       - name: run benchmarks
-        run: python3 ${{github.workspace}}/build/plot.py
+        run: |
+          cd ${{github.workspace}}/build
+          python3 ../plot.py
       - name: upload results
         uses: actions/upload-artifact@v4
         with: