Update reg test for MUSCL species testcase after recent fix

Author: TobiKattmann

TestCases/parallel_regression.py

@@ -1628,7 +1628,7 @@ def main():
     species_passive_val.cfg_dir   = "species_transport/passive_transport_validation"
     species_passive_val.cfg_file  = "passive_transport.cfg"
     species_passive_val.test_iter = 50
-    species_passive_val.test_vals = [-16.559189, -16.315116, -16.908670, -4.316833, 10.000000, -4.523292, 8.000000, -5.173152]
+    species_passive_val.test_vals = [-16.559189, -16.315116, -16.908670, -4.257599, 10.000000, -4.523292, 8.000000, -5.193350]
     species_passive_val.su2_exec  = "mpirun -n 2 SU2_CFD"
     species_passive_val.timeout   = 1600
     species_passive_val.new_output = True