Add link to sponsorship slides at Top

Author: yasulab

index.html

@@ -61,13 +61,11 @@
       <div style="margin-top: 0.5em;">なごのキャンパス @ 名古屋</div>
       <div style="margin-top: 0.5em;" class="cursor">SAVE THE DATE</div>
 
-      <!--
       <div style='margin-top: 2.0em; margin-bottom: 0.5em; font-size: 55%;'>
-	<a href='#' style='text-decoration: none;'>
+	<a href='https://docs.google.com/presentation/d/1MAX_O_2FhmLvBU52SnWe6jGR0QgAcglN/edit' style='text-decoration: none;'>
 	  &raquo; スポンサー募集中！
 	</a>
       </div>
-      -->
 
       <div style='margin-top: 2.0em;'>
         <img src="/img/cover-photo.webp" loading="lazy" width='100%'