fix: race condition on ResourceFolderModel tests

This (hopefully) fixes the race contiditions that sometimes got
triggered in tests.

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

launcher/minecraft/mod/tasks/LocalModParseTask.h

@@ -39,5 +39,5 @@ private:
     QFileInfo m_modFile;
     ResultPtr m_result;
 
-    bool m_aborted = false;
+    std::atomic<bool> m_aborted = false;
 };