style: remove max-width from .results-note

`.results-note` carried an inner `max-width: 28rem`, which breaks the rule that `.section-shell` is the only width cap.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: vinta

website/static/style.css

@@ -723,7 +723,6 @@ kbd {
   color: var(--ink-soft);
   font-size: var(--text-sm);
   justify-self: end;
-  max-width: 28rem;
 }
 
 .controls {