fix update failed

update

@@ -19,6 +19,8 @@ download_and_unzip() {
 
 # 下载程序资源，$1: 后端版本路径
 install_backend_and_download_resources() {
+    # 清理临时目录，上次安装失败可能有残留
+    rm -rf /tmp/*
     if download_and_unzip "https://github.com/jxxghp/MoviePilot/archive/refs/${1}" "App"; then
         echo "后端程序下载成功"
         pip install ${PIP_OPTIONS} --upgrade pip
@@ -128,4 +130,4 @@ elif [[ "${MOVIEPILOT_AUTO_UPDATE}" = "false" ]]; then
     echo "程序自动升级已关闭，如需自动升级请在创建容器时设置环境变量：MOVIEPILOT_AUTO_UPDATE=release"
 else
     echo "MOVIEPILOT_AUTO_UPDATE 变量设置错误"
-fi
+fi