Fix typo in aria attribute name (#1490370)

skins/larry/templates/compose.html

@@ -77,7 +77,7 @@
 <div id="composeheaders" role="region" aria-labelledby="aria-label-composeheaders">
 <h2 id="aria-label-composeheaders" class="voice"><roundcube:label name="arialabelmessageheaders" /></h2>
 
-<a href="#options" id="composeoptionstoggle" class="moreheaderstoggle" title="<roundcube:label name='togglecomposeoptions' />" aria-exapnded="false"><span class="iconlink"></span></a>
+<a href="#options" id="composeoptionstoggle" class="moreheaderstoggle" title="<roundcube:label name='togglecomposeoptions' />" aria-expanded="false"><span class="iconlink"></span></a>
 
 <table class="headers-table compose-headers">
 <tbody>