chore(demo): fix typo in PanoViewer hotstpot demo

Author: ghleokim

demo/examples/panoviewer/etc/hotspot.html

@@ -264,7 +264,7 @@ <h2>Drag and rotate the photo. An anchor will follow.</h2>
     </div>
     <div class="hotspot search" data-page="2" data-anchor-index="0" data-yaw="-60" data-pitch="-23" onclick="openLayer('book4.jpg')"></div>
     <div class="hotspot link" data-page="2" data-anchor-index="1" data-yaw="80" data-pitch="-12" onclick="load(this, 1)">
-        Technowlogy<br />Science
+        Technology<br />Science
     </div>
 </div>
 <div class="source">