yuzu/configuration: Add missing override specifiers to configuration-related classes

Resolves trivial compiler warnings.

src/yuzu/configuration/configure_general.h

@@ -18,7 +18,7 @@ class ConfigureGeneral : public QWidget {
 
 public:
     explicit ConfigureGeneral(QWidget* parent = nullptr);
-    ~ConfigureGeneral();
+    ~ConfigureGeneral() override;
 
     void PopulateHotkeyList(const HotkeyRegistry& registry);
     void applyConfiguration();