update description of new test

autotest/test_gwe_uze_auxmult.py

@@ -4,8 +4,8 @@
 host cell.  If this condition is violated, the code exits with an
 appropriate message. Two variations of the same test problem are scripted; the
 first test combines GWF and GWE into a single simulation and should error out.
-The second test splits GWF and GWE into two different simulations where the
-simulation containing the GWE model should also error out.
+The second test splits GWF and GWE into two different simulations connected
+via FMI and the simulation containing the GWE model also should error out.
 """
 
 import flopy