Capitalize categories in hierarchy

src/components/NoteHierarchy.astro

@@ -10,8 +10,9 @@ interface Props {
 
 const { prefix, hierarchy: maybeHierarchy} = Astro.props;
 
-const hierarchy = maybeHierarchy ?? makeHierarchy((await getCollection('notes')).map(note => [note.id, note.data.title]));
+const notes = await getCollection('notes');
 
+const hierarchy = maybeHierarchy ?? makeHierarchy(notes.map(note => [note.id, note.data.title]));
 
 const pathname = Astro.url.pathname.replace(import.meta.env.BASE_URL, '/');