Update appcast.xml

Author: intitni

appcast.xml

@@ -2,6 +2,19 @@
 <rss xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" version="2.0">
   <channel>
     <title>Copilot for Xcode</title>
+
+    <item>
+      <title>0.31.3</title>
+      <pubDate>Fri, 29 Mar 2024 18:52:57 +0800</pubDate>
+      <sparkle:version>343</sparkle:version>
+      <sparkle:shortVersionString>0.31.3</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.31.3
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.31.3/Copilot.for.Xcode.app.zip" length="40417373" type="application/octet-stream" sparkle:edSignature="lKzSfjspSyqkHDtqKloUTcIPUlTMAHo7y7PzYSiUnWyPOMNsl8G8vbkpqmwJCCvvrDaxv3qW4s4k3NxoENlLBg=="/>
+    </item>
+    
     <item>
       <title>0.31.2</title>
       <pubDate>Thu, 14 Mar 2024 22:26:51 +0800</pubDate>