fix: oilprice route (#2395)

lib/routes/oilprice/index.js

@@ -11,12 +11,12 @@ module.exports = async (ctx) => {
         responseType: 'buffer',
     });
     const $ = cheerio.load(iconv.decode(response.data, 'gb2312'));
-    const $list = $('.pp')
+    const $list = $('.content')
         .eq(0)
         .find('table tbody tr');
     const resultItem = [];
     let areaName = '';
-    const updateTime = $('.pm')
+    const updateTime = $('.time')
         .text()
         .split('：')[1];
     const labelList = $list