Restore the default parameter file for the constant cosmological box.

examples/ConstantCosmoVolume/constant_volume.yml

@@ -23,7 +23,7 @@ TimeIntegration:
 Snapshots:
   basename:	       box      # Common part of the name of output files
   time_first:          0.       # Time of the first output (in internal units)
-  delta_time:          1.001     # Time difference between consecutive outputs (in internal units)
+  delta_time:          1.04     # Time difference between consecutive outputs (in internal units)
   scale_factor_first:  0.00991
   compression:         4