fix: show correct unlinked files count (#653)

Author: SkeleyM

tagstudio/src/qt/modals/fix_unlinked.py

@@ -144,4 +144,4 @@ def set_missing_count(self, count: int | None = None):
             # disable buttons if there are no files to fix
             self.search_button.setDisabled(self.missing_count == 0)
             self.delete_button.setDisabled(self.missing_count == 0)
-            self.missing_count_label.setText(f"Unlinked Entries: {count}")
+            self.missing_count_label.setText(f"Unlinked Entries: {self.missing_count}")