Update index.html

Author: XinJeisan

index.html

@@ -669,16 +669,7 @@ <h4 lang="ja">最近の考察</h4>
         <time class="updated-on" datetime="2025-08-22">Updated on Aug 22 2025</time>
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-        <time class="updated-on" datetime="2025-08-22">Updated on Aug 22 2025</time>
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     <section class="card" id="writing">
       <h3 lang="en">✍️ Explorations in Voice</h3>
       <h3 lang="ja">✍️ 声への探求</h3>