fix material params

Author: philbucher

co_simulation/validation/fsi_mok/source/StructuralMaterials.json

@@ -8,7 +8,7 @@
             },
             "Variables"        : {
                 "DENSITY"       : 1500.0,
-                "YOUNG_MODULUS" : 2600000.0,
+                "YOUNG_MODULUS" : 2300000.0,
                 "POISSON_RATIO" : 0.45,
                 "THICKNESS"     : 1.0
             },