Update appcast.xml

Author: intitni

appcast.xml

@@ -3,6 +3,18 @@
   <channel>
     <title>Copilot for Xcode</title>
 
+    <item>
+      <title>0.20.1</title>
+      <pubDate>Fri, 21 Jul 2023 16:00:42 +0800</pubDate>
+      <sparkle:version>210</sparkle:version>
+      <sparkle:shortVersionString>0.20.1</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.20.1
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.20.1/Copilot.for.Xcode.app.zip" length="25114525" type="application/octet-stream" sparkle:edSignature="qGO+GzIPqOvFNk5NhFvo+aB/23qN6edG872/26nXjxLdBwsW2poPbIOf8A3V1zmAu+EZw6kkhke6agGqaWbkBA=="/>
+    </item>
+
     <item>
       <title>0.20.0</title>
       <pubDate>Tue, 11 Jul 2023 13:32:57 +0800</pubDate>