fix(项目管理): 修复导出多个环境的缺陷

--bug=1037598 --user=王孝刚 【项目管理】环境管理-导出多个环境失败
https://www.tapd.cn/55049933/s/1479506

frontend/src/views/project-management/environmental/index.vue

@@ -232,7 +232,7 @@
       systemTitle: t('project.environmental.env.systemTitle'),
       selectedTitle: t('project.environmental.env.selectedTitle'),
     }"
-    @confirm="(v) => handleEnvExport(v.map((item) => item.id))"
+    @confirm="(v) => handleEnvExport(v.map((item) => item.key))"
   />
 </template>