fix: escape ]]> and unescape & in podcast description

services/podcast.ts

@@ -27,7 +27,7 @@ export async function updatePodcastRSS() {
     itemsXml += `
       <item>
         <title><![CDATA[${ep.title}]]></title>
-        <description><![CDATA[${ep.title.replace(/\]\]>/g, "]]&gt;")}]]></description>
+        <description><![CDATA[${ep.title.replace(/\]\]>/g, "]]&gt;").replace(/&amp;/g, "&")}]]></description>
         <author>${channelAuthor}</author>
         <category>${channelCategories}</category>
         <language>${channelLanguage}</language>