fix(test_gwe_drycell_cond0): user reporting better performance with s…

…mall change to assert setup (MODFLOW-USGS#1758)

autotest/test_gwe_drycell_cnd0.py

@@ -403,7 +403,7 @@ def check_output(idx, test):
         "Pass through cell should not be as warm as its neighbor to "
         "the left"
     )
-    assert np.all(conc1[1:, 0, 0, 2] > conc1[1:, 0, 0, 3]), msg5
+    assert np.all(np.round(conc1[:, 0, 0, 3] - conc1[:, 0, 0, 2], 8) <= 0), msg5
 
 
 # - No need to change any code below