docs: update advanced feed title

docs/.vuepress/config.js

@@ -136,7 +136,7 @@ module.exports = {
                             collapsable: false,
                             children: [
                                 {
-                                    title: '🎧 制作多媒体 RSS 订阅源',
+                                    title: '🌱 RSS 基础',
                                     path: 'advanced-feed',
                                 },
                                 {
@@ -247,7 +247,7 @@ module.exports = {
                             collapsable: false,
                             children: [
                                 {
-                                    title: '🎧 Create a Rich Media RSS Feed',
+                                    title: '🌱 RSS Feed Fundamentals',
                                     path: 'advanced-feed',
                                 },
                                 {

docs/en/joinus/advanced-feed.md

@@ -1,4 +1,4 @@
-# Create a Rich Media RSS Feed
+# RSS Feed Fundamentals
 
 This guide is intended for advanced users who want to know how to create an RSS feed in detail.  If you're new to creating RSS feeds, we recommend reading [Create Your Own RSSHub Route](/en/joinus/new-rss/start-code.html) first.
 

docs/joinus/advanced-feed.md

@@ -1,4 +1,4 @@
-# 制作多媒体 RSS 订阅源
+# RSS 基础
 
 本指南面向希望深入了解如何制作 RSS 订阅源的高级用户。如果您是第一次制作 RSS 订阅源，我们建议先阅读 [制作自己的 RSSHub 路由](/joinus/new-rss/start-code.html)。