fix: `cssclasses` was not applied on folder note (index) (#749)

Mara-Li

2024-01-29 16adbd30114bfcc1aaefa851a5a1786787f97a10

 quartz/util/lang.ts

@@ -5,3 +5,7 @@
    return `${count} ${s}s`
  }
}

export function capitalize(s: string): string {
  return s.substring(0, 1).toUpperCase() + s.substring(1)
}