Update appcast.xml

Author: intitni

appcast.xml

@@ -3,6 +3,18 @@
   <channel>
     <title>Copilot for Xcode</title>
 
+    <item>
+      <title>0.18.1</title>
+      <pubDate>Sat, 10 Jun 2023 17:03:06 +0800</pubDate>
+      <sparkle:version>181</sparkle:version>
+      <sparkle:shortVersionString>0.18.1</sparkle:shortVersionString>
+      <sparkle:minimumSystemVersion>12.0</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>
+        https://github.com/intitni/CopilotForXcode/releases/tag/0.18.1
+      </sparkle:releaseNotesLink>
+      <enclosure url="https://github.com/intitni/CopilotForXcode/releases/download/0.18.1/Copilot.for.Xcode.app.zip" length="19871775" type="application/octet-stream" sparkle:edSignature="v82HyzmFkWaaoN/VPrlRE8qMElo32a4KNVbyHk2CDHaps/777dZZvhcvB629Bzy8RNOTyo4wHQfdma1tt9JCBw=="/>
+    </item>
+
     <item>
       <title>0.18.0</title>
       <pubDate>Thu, 08 Jun 2023 14:34:14 +0800</pubDate>