Update index.html

Author: mulle-nat

index.html

@@ -45,7 +45,7 @@
       <table class="page-header-table" border=0 cellpadding="0" cellspacing="0">
       <tr>
       <td style="border: 0">
-      <img src="pix/mulle-objc-logo-opaque-160x160.png" width="160" height="160">
+      <img src="pix/mulle-objc-logo-opaque.svg" width="160" height="160">
       </td>
       <td style="border: 0">
       <div style="width: 40px;">&nbsp;</div>