fix(tooltip-sample): rename disableArrow prop

Author: RivaIvanova

src/app/tooltip/tooltip.sample.html

@@ -46,7 +46,7 @@ <h4 class="sample-title">Simple tooltip</h4>
         <h4 class="sample-title">Tooltip input</h4>
         <div class="sample-tooltip-input">
 
-            <igx-avatar class="bottomMargin" src="assets/images/avatar/10.jpg" size="medium" igxTooltipTarget [tooltip]="'Her name is Toola Tipa'" [disableArrow]="true">
+            <igx-avatar class="bottomMargin" src="assets/images/avatar/10.jpg" size="medium" igxTooltipTarget [tooltip]="'Her name is Toola Tipa'" [hasArrow]="true">
             </igx-avatar>
 
             <igx-icon igxTooltipTarget [tooltip]="'Infragistics Inc. HQ'">