homepage: typo

miscellaneous/homepage/index.html

@@ -510,7 +510,7 @@ strong {
         <div>
             <p>The project aims to harness the power of cloud computing in
             education and research. Our self service portal helps migrating
-            old servers, and on-demand launching appliences prepared by the
+            old servers, and on-demand launching appliances prepared by the
             teacher.</p>
             </p>
         </div>