Move myself to inactive

about.html

@@ -22,7 +22,6 @@
 
 <ul>
 <li><a href="https://github.com/remitamine">Remita Amine</a>: core developer.</li>
-<li><a href="https://github.com/dstftw">Sergey M.</a>: core developer, maintainer since 2016.</li>
 </ul>
 
 <p>Core team (inactive):</p>
@@ -35,6 +34,7 @@
 <li><a href="https://github.com/yan12125">Yen Chi Hsuan</a>: core developer.</li>
 <li><a href="https://github.com/naglis">Naglis Jonaitis</a>: core developer.</li>
 <li><a href="https://github.com/pulpe">pulpe</a>: core developer.</li>
+<li><a href="https://github.com/dstftw">Sergey M.</a>: core developer, maintainer 2016-2021.</li>
 </ul>
 
 <p>Many <a href="https://github.com/ytdl-org/youtube-dl/blob/master/AUTHORS">other people</a> contributing patches, code, ideas and kind messages. <a href="https://github.com/ytdl-org/youtube-dl/graphs/contributors">Too many</a> to be listed here. You know who you are. Thank you very much.</p>