Give the second card in hack.roleMod.html a distinct speak

Both cards had speak 'Hello, World!', so the live region snapshot read the same line twice.

Author: Eugene Olonov

__tests__/html2/accessibility/adaptiveCard/hack.roleMod.html

@@ -44,7 +44,7 @@
                 type: 'AdaptiveCard',
                 $schema: 'http://adaptivecards.io/schemas/adaptive-card.json',
                 version: '1.5',
-                speak: 'Hello, World!',
+                speak: 'Please enter your full name',
                 body: [
                   {
                     type: 'Input.Text',
@@ -75,7 +75,7 @@
 
         await pageConditions.liveRegionStabilized();
 
-        // THEN: The live region shows what screen readers announce: "Bot said:", "A card: Hello, World!" (the "speak" property) for each card, then the input of the second card.
+        // THEN: The live region shows what screen readers announce: "Bot said:", one line per card from its "speak" property ("A card: Hello, World!", "A card: Please enter your full name"), then the input of the second card.
         await host.snapshot('local');
       });
     </script>