fix: 修复3DM新闻的标题，添加了分类字段 (#3185)

lib/routes/3dm/news_center.js

@@ -23,6 +23,12 @@ module.exports = async (ctx) => {
             }
             const title = $(item)
                 .find('.text')
+                .find('.bt')
+                .text();
+
+            const category = $(item)
+                .find('.text')
+                .find('.bq')
                 .find('a')
                 .text();
 
@@ -40,6 +46,7 @@ module.exports = async (ctx) => {
 
             const single = {
                 title: title,
+                category: category,
                 description: description,
                 pubDate: time.toUTCString(),
                 link: itemUrl,