chore(rss): auto-generate feed.xml

Author: github-actions[bot]

feed.xml

@@ -5,7 +5,7 @@
   <link>https://kadubon.github.io/github.io/</link>
   <description>Research preprints and theoretical works by K. Takahashi</description>
   <language>en</language>
-  <lastBuildDate>Fri, 03 Apr 2026 18:06:38 +0900</lastBuildDate>
+  <lastBuildDate>Fri, 03 Apr 2026 18:26:25 +0900</lastBuildDate>
   <atom:link rel="self" type="application/rss+xml" href="https://kadubon.github.io/github.io/feed.xml" />
   <item>
     <title>When Should a Local Agent Act, Assist, Verify, Withdraw, or Exit? A Certified Local Micro-Theory of Open-Task Participation</title>