refactor: make shared_qobject_ptr ctor explicit

This turns issues like creating two shared ptrs from a single raw ptr
from popping up at runtime, instead making them a compile error.

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/net/Upload.h

@@ -45,6 +45,8 @@ namespace Net {
         Q_OBJECT
 
     public:
+        using Ptr = shared_qobject_ptr<Upload>;
+
         static Upload::Ptr makeByteArray(QUrl url, QByteArray *output, QByteArray m_post_data);
         auto abort() -> bool override;
         auto canAbort() const -> bool override { return true; };