fix: Can't do app upgrade in mint

Signed-off-by: shenmo <jifengshenmo@outlook.com>

Author: shenmo7192

src/spark-update-tool/src/aptssupdater.cpp

@@ -78,7 +78,7 @@ QStringList aptssUpdater::getPackageSizes()
 
     foreach (const QString &packageName, updateablePackages) {
         // 构建新命令（包含包名参数）
-        QString command = QString("apt download %1 --print-uris -c /opt/durapps/spark-store/bin/apt-fast-conf/aptss-apt.conf "
+        QString command = QString("/usr/bin/apt download %1 --print-uris -c /opt/durapps/spark-store/bin/apt-fast-conf/aptss-apt.conf "
                                   "-o Dir::Etc::sourcelist=\"/opt/durapps/spark-store/bin/apt-fast-conf/sources.list.d/sparkstore.list\" "
                                   "-o Dir::Etc::sourceparts=\"/dev/null\"").arg(packageName);