fix missing theme meta info

Author: wxiaoguang

web_src/css/themes/theme-gitea-auto-protanopia-deuteranopia.css

@@ -1,2 +1,6 @@
 @import "./theme-gitea-light-protanopia-deuteranopia.css" (prefers-color-scheme: light);
 @import "./theme-gitea-dark-protanopia-deuteranopia.css" (prefers-color-scheme: dark);
+
+gitea-theme-meta-info {
+  --theme-display-name: "Auto (Red/Green Colorblind-friendly)";
+}