Update letters.html

Updated the attendance link

Author: JakeMitstifer

letters.html

@@ -60,7 +60,7 @@
 					<li><a href="index.html#outreach" title="">Outreach</a></li>
           				<li><a href="index.html#faq" title="">Contact</a></li>
 					<li class="highlight with-sep"><a href="https://squareup.com/store/ans-at-uiuc" title="">Market</a></li>
-					<li class="highlight with-sep"><a href="https://forms.gle/XKEukiQcfRj3ZE7m6" title="">Attendance</a></li>
+					<li class="highlight with-sep"><a href="https://forms.gle/ivmi4tztH6Vro2tc8" title="">Attendance</a></li>
 					<li class="highlight with-sep"><a href="letters.html" title="">Newsletters and Slides</a></li>
 				</ul>
 			</nav>