[slides][problem] Fixup

slides/problem.md

@@ -134,11 +134,11 @@ namespace Dumux::Properties {
 template<class TypeTag>
 struct SpatialParams<TypeTag, TTag::Injection2pCC>
 {
-    using FVGridGeometry
-        = GetPropType<TypeTag, Properties::FVGridGeometry>;
+    using GridGeometry
+        = GetPropType<TypeTag, Properties::GridGeometry>;
     using Scalar
         = GetPropType<TypeTag, Properties::Scalar>;
-    using type = InjectionSpatialParams<FVGridGeometry, Scalar>;
+    using type = InjectionSpatialParams<GridGeometry, Scalar>;
 };
 
 } // end namespace Dumux::Properties