Docs: cleanup own typo for dismiss-popup-ID

Author: MauriceG

docs/pages/popup/index.html

@@ -192,7 +192,7 @@ <h2>Closing popups</h2>
 
 		<a href="#popupCloseRight" data-rel="popup" data-role="button" data-inline="true">Popup with close button right</a>
 		<a href="#popupCloseLeft" data-rel="popup" data-role="button" data-inline="true">Popup with close button left</a>
-		<a href="#popupUnismissable" data-rel="popup" data-role="button" data-inline="true">Undismissable Popup</a>
+		<a href="#popupUndismissable" data-rel="popup" data-role="button" data-inline="true">Undismissable Popup</a>
 
 		<div data-role="popup" id="popupCloseRight" class="ui-content" style="max-width:280px">
 			<a href="#" data-rel="back" data-role="button" data-theme="a" data-icon="delete" data-iconpos="notext" class="ui-btn-right">Close</a>
@@ -204,7 +204,7 @@ <h2>Closing popups</h2>
 			<p>I have a close button at the top left corner with simple HTML markup.</p>
 		</div>
 
-		<div data-role="popup" id="popupUnismissable" class="ui-content" style="max-width:280px" data-dismissable="false">
+		<div data-role="popup" id="popupUndismissable" class="ui-content" style="max-width:280px" data-dismissable="false">
 			<a href="#" data-rel="back" data-role="button" data-theme="a" data-icon="delete" data-iconpos="notext" class="ui-btn-left">Close</a>
 			<p>I have the <code>data-dismissable</code> attribute set to <code>false</code>. I'm not closeable be clicking outside of me.</p>
 		</div>