adjust validator

src/server/routes/apiv3/customize-setting.js

@@ -95,7 +95,7 @@ module.exports = (crowi) => {
     layoutTheme: [
       body('layoutType').isString().isIn(['growi', 'kibela']),
       body('themeType').isString().isIn([
-        'default', 'nature', 'mono-blue', 'wood', 'island', 'christmas', 'antarctic', 'future', 'halloween', 'spring',
+        'default', 'nature', 'mono-blue', 'wood', 'island', 'christmas', 'antarctic', 'future', 'halloween', 'spring', 'kibela',
       ]),
     ],
     function: [