fix(market/detail.vue): navigateBack instead of deleted plans page

cfc-frontend/pages/parent/market/detail.vue

@@ -116,7 +116,7 @@ export default {
             })
             uni.showToast({ title: '应用成功' })
             setTimeout(() => {
-              uni.navigateTo({ url: '/pages/parent/plans/index' })
+              uni.navigateBack()
             }, 1500)
           } catch (e) {
             uni.showToast({ title: '应用失败', icon: 'none' })