docs: fixing duplicate snippet

Author: NickIliev

app/ng-ui-category/icon-fonts/basics/basic.component.html

@@ -2,7 +2,7 @@
 <StackLayout class="m-16" horizontalAlignment="center">
     <Label text="Icon Fonts demonstration" fontSize="18"></Label>
 
-    <!-- >> icon-font-xml-def -->
+    <!-- >> icon-font-html-def -->
     <!-- Using fa-regular-400.ttf -->
     <Label text="&#xf019;" class="far"></Label>
 
@@ -18,5 +18,5 @@
 
     <!-- Using IcoMoon-Free.ttf -->
     <Label text="&#xe904;" class="ico"></Label>
-    <!-- << icon-font-xml-def -->
+    <!-- << icon-font-html-def -->
 </StackLayout>