note shortcode: Use title as title when specified

I think this was accidentally changed in
7287ff7?

This isn't a pure revert - it sets up a fallback chain of
title > type > Note rather than just title > Note

common-theme/layouts/shortcodes/note.html

@@ -14,13 +14,13 @@
   "tip" ":bulb:"
   "warning" ":warning:"
 }}
-{{$title := .Get "title" | default "Note"}}
+{{$title := .Get "title" | default (.Get "type") | default "Note"}}
 {{$noteType := .Get "type" | default "note"}}
 
 <section class="c-note c-note--{{$noteType}}">
   <h4 class="c-note__title e-heading__4">
     {{ transform.Emojify (index $emojis $noteType) }}
-      {{ or (i18n $noteType) ($noteType) }}</span>
+      {{ or (i18n $noteType) ($title) }}</span>
   </h4>
   <div class="c-note__text ">{{ printf "%s" .Inner | markdownify }}</div>
 </section>