fix: add forgotten override

Author: NiziL

applications/plugins/PersistentContact/src/PersistentContact/PersistentFrictionContact.h

@@ -143,9 +143,9 @@ class PersistentFrictionContact : public response::contact::FrictionContact<TCol
 protected:
 
     /// Set the generic description of a contact point
-    void doSetDetectionOutputs(OutputVector* outputs);
+    void doSetDetectionOutputs(OutputVector* outputs) override;
 
-    void doCreateResponse(core::objectmodel::BaseContext* group);
+    void doCreateResponse(core::objectmodel::BaseContext* group) override;
 
     void doRemoveResponse() override;