Check file contents according to changes in tardis-sn/tardis-refdata#58

.github/workflows/bridge.yml

@@ -136,4 +136,4 @@ jobs:
           path: ref_data_compare_from_paths.html
 
       - name: Check if reference data are equal
-        run: if [ "$(cat /tmp/spectrum_compare)" == 0 ]; then exit 1; fi
+        run: if [ "$(cat refdata_compare_result)" == "REFDATA COMPARISON FAILED" ]; then exit 1; fi