Update appcast.xml

Author: intitni

appcast.xml

@@ -3,6 +3,18 @@
   <channel>
     <title>Copilot for Xcode</title>
 
+    <item>
+      <title>0.13.1</title>
+      <pubDate>Sat, 22 Apr 2023 23:07:44 +0800</pubDate>
+      <sparkle:version>105</sparkle:version>
+      <sparkle:shortVersionString>0.13.1</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.13.1
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.13.1/Copilot.for.Xcode.app.zip" length="20093578" type="application/octet-stream" sparkle:edSignature="j0vvvbjpMVwlwICjysIG5SGLm4k4CMfL38reZF5S/u2pUj8GAzxzyLDbD62GKNUHl1m0pBxQURKkPcs1i5/PCQ=="/>
+    </item>
+
     <item>
       <title>0.13.0</title>
       <pubDate>Sat, 22 Apr 2023 12:20:16 +0800</pubDate>