Update appcast for version 1.4.0

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: mblackmon

appcast.xml

@@ -4,6 +4,49 @@
         <title>WorkTreeBuddy</title>
         <description>Updates for WorkTreeBuddy</description>
         <language>en</language>
+        <item>
+            <title>Version 1.4.0</title>
+            <pubDate>Fri, 29 Aug 2025 21:56:43 +0000</pubDate>
+            <sparkle:version>14</sparkle:version>
+            <sparkle:shortVersionString>1.4.0</sparkle:shortVersionString>
+            <description><![CDATA[
+            
+            ### Changed
+            - Version bump for release automation improvements
+            - Updated to version 1.4.0
+            
+            ]]></description>
+            <enclosure url="https://github.com/oreillymedia/worktreebuddy/releases/download/v1.4.0/WorkTreeBuddy.dmg"
+                       type="application/octet-stream"
+                       length="2954532"
+                       sparkle:edSignature="SPg94lI6NtfB/JifqGYxAKn7bHz8yjaDfHzsaIdXYQOoSOlMwbqd3h29wJbfvrxFiGOK1RdQGBi48UrD2bO+Cg==" />
+        </item>
+        <item>
+            <title>Version 1.3.2</title>
+            <pubDate>Fri, 29 Aug 2025 21:53:57 +0000</pubDate>
+            <sparkle:version>13</sparkle:version>
+            <sparkle:shortVersionString>1.3.2</sparkle:shortVersionString>
+            <description><![CDATA[
+
+            ]]></description>
+            <enclosure url="https://github.com/oreillymedia/worktreebuddy/releases/download/v1.3.2/WorkTreeBuddy.dmg"
+                       type="application/octet-stream"
+                       length="2955625"
+                       sparkle:edSignature="ysFrOpPpt8i/1kdcb5rI07xrrRBH14Z/TDyFtcIXqKQwHRD1Jlqvtrui6GZbmYOC/JXN/63Ba1KT/XQAITtTAg==" />
+        </item>
+        <item>
+            <title>Version 1.3.2</title>
+            <pubDate>Fri, 29 Aug 2025 21:52:01 +0000</pubDate>
+            <sparkle:version>13</sparkle:version>
+            <sparkle:shortVersionString>1.3.2</sparkle:shortVersionString>
+            <description><![CDATA[
+
+            ]]></description>
+            <enclosure url="https://github.com/oreillymedia/worktreebuddy/releases/download/v1.3.2/WorkTreeBuddy.dmg"
+                       type="application/octet-stream"
+                       length="2955625"
+                       sparkle:edSignature="ysFrOpPpt8i/1kdcb5rI07xrrRBH14Z/TDyFtcIXqKQwHRD1Jlqvtrui6GZbmYOC/JXN/63Ba1KT/XQAITtTAg==" />
+        </item>
         <item>
             <title>Version 1.3.2</title>
             <pubDate>Thu, 14 Aug 2025 20:01:04 +0000</pubDate>