fix: Update comment to accurately describe textContent usage

Address PR review comment: say "text content" instead of
"visible text content" since textContent includes all text nodes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: uzirthapa

packages/bundle/src/adaptiveCards/Attachment/AdaptiveCardHacks/useRoleModEffect.ts

@@ -41,7 +41,7 @@ export default function useRoleModEffect(
       const hasOriginalAriaLabel = !!cardElement.getAttribute('aria-label');
 
       // If the card doesn't have an aria-label (i.e. no "speak" property was set),
-      // derive one from the card's visible text content so screen readers can announce it.
+      // derive one from the card's text content so screen readers can announce it.
       let undoAriaLabel: (() => void) | undefined;
 
       if (!hasOriginalAriaLabel) {