Fix generate_reference_test_data.yml (#335)

Author: mathrack

.github/workflows/generate_reference_test_data.yml

@@ -48,7 +48,7 @@ jobs:
         ctest --test-dir build --rerun-failed --output-on-failure
     - name: Store new reference output
       run: |
-        cp -v build/RunTests/RunTests/TGV-Taylor-Green-vortex/time_evol.dat tests/TGV-Taylor-Green-vortex/reference_time_evol.dat
+        cp -v build/RunTests/TGV-Taylor-Green-vortex/time_evol.dat tests/TGV-Taylor-Green-vortex/reference_time_evol.dat
     - name: Create new Pull Request updating the reference output
       uses: peter-evans/create-pull-request@v4
       with: