test(action-sheet): set aria label as a string

Author: brandyscarney

core/src/components/action-sheet/test/a11y/index.html

@@ -76,7 +76,7 @@ <h1>Action Sheet - A11y</h1>
             {
               text: 'Close',
               htmlAttributes: {
-                ariaLabel: 'close button',
+                'aria-label': 'close button',
                 'aria-labelledby': 'close-label',
               },
             },
@@ -93,7 +93,7 @@ <h1>Action Sheet - A11y</h1>
               text: 'Cancel',
               role: 'cancel',
               htmlAttributes: {
-                ariaLabel: 'cancel button',
+                'aria-label': 'cancel button',
                 'aria-labelledby': 'cancel-label',
               },
             },