[Instagram] 修复使用path.join导致的URL不正确的BUG

lib/routes/instagram/index.js

@@ -55,7 +55,7 @@ module.exports = async (ctx) => {
             logo = userInfo.hd_profile_pic_url_info.url;
             const fullName = userInfo.full_name;
             title = `${fullName} (@${username}) - Instagram`;
-            link = path.join('https://www.instagram.com', username);
+            link = `https://www.instagram.com/${username}`;
 
             itemsRaw = await ig.feed.user(id).items();
             break;
@@ -64,7 +64,7 @@ module.exports = async (ctx) => {
             const tag = nameOrId;
 
             title = `#${tag}) - Instagram`;
-            link = path.join('https://www.instagram.com', 'explore', 'tags', tag);
+            link = `https://www.instagram.com/explore/tags/${tag}`;
 
             itemsRaw = await (await ig.feed.tags(tag).items()).slice(1); // the 0 item is undefined for unknown reason
             break;
@@ -89,7 +89,7 @@ module.exports = async (ctx) => {
             }
 
             // Metadata
-            const url = path.join('https://www.instagram.com', 'p', item.code);
+            const url = `https://www.instagram.com/p/${item.code}`;
             const pubDate = new Date(item.taken_at * 1000).toUTCString();
             const title = summary.split('\n')[0];