fix example test

Author: ChrisZYJ

examples/2D_axisym_hypoelasticity/case.py

@@ -13,10 +13,10 @@
             "y_domain%beg": 0.0,
             "y_domain%end": 0.0005,
             "cyl_coord": "T",
-            "m": 49,
-            "n": 24,
+            "m": 100,
+            "n": 50,
             "p": 0,
-            "dt": 2e-9,
+            "dt": 1e-9,
             "t_step_start": 0,
             "t_step_stop": 400,
             "t_step_save": 20,