Add back missing link to rotation note #251

Author: zimeon

source/api/image/1.1/index.html

@@ -1122,7 +1122,7 @@ <h2>
               <li>
                 As described in <a href="#parameters-rotation">Section 4.2 (Rotation)</a>, in order to retain the size of the
                 requested image contents, rotation will change the width and height dimensions of the returned image file. A
-                formula for calculating the dimensions of the returned image file for a given rotation can be found here.
+                formula for calculating the dimensions of the returned image file for a given rotation can be found <a href="../../annex/notes/rotation.html">here</a>.
               </li>
             </ul>
           </section>