Fix spelling mistake

Author: Moredread

usr/lib/lua/luci/view/arduino/homepage.htm

@@ -87,7 +87,7 @@ <h3><% if data["pretty_name"] then %><%= data["pretty_name"] %> (<%= name %>)<%
                 <span class="val"><%= data["rx"] %></span>
               </span>
               <span class="row">
-                <span class="desc">Trasmitted</span>
+                <span class="desc">Transmitted</span>
                 <span class="val"><%= data["tx"] %></span>
               </span>
             </p>