fix(memory leak): don't give shared pointers out to foldermodels (causes cyclic refrence)

Signed-off-by: Rachel Powers <508861+Ryex@users.noreply.github.com>

launcher/minecraft/mod/ShaderPackFolderModel.h

@@ -6,7 +6,7 @@ class ShaderPackFolderModel : public ResourceFolderModel {
     Q_OBJECT
 
    public:
-    explicit ShaderPackFolderModel(const QString& dir, std::shared_ptr<const BaseInstance> instance)
+    explicit ShaderPackFolderModel(const QString& dir, BaseInstance* instance)
         : ResourceFolderModel(QDir(dir), instance)
     {}
 };