Update upstream.yml

.github/workflows/upstream.yml

@@ -574,7 +574,7 @@ jobs:
           -e '$a\
         .modal>pre,.modal>textarea{color: #ccc}\
         .login-page.defwallpaper .login-container{background-color: rgb(136 136 136 / 14%);backdrop-filter: blur(0);margin:0 auto;}\
-        .defwallpaper.defwallpaper .main-bg img{object-position: -99999px -99999px;}\
+        .defwallpaper.defwallpaper .main-bg img{object-position: -99999px -99999px;opacity: 0;}\
         .main .main-right{background-color: transparent}' \
           luci-theme-argon/htdocs/luci-static/argon/css/dark.css
         sed -i 's,https://raw.githubusercontent.com,https://v4.gh-proxy.org/https://raw.githubusercontent.com,g' \