docs: Add Aster's notebook to showcase.md (#912)

Aster Hu

2024-02-22 916aedce40864a485724d9df78879e8d130beab3

 quartz/plugins/filters/index.ts

@@ -1,2 +1,2 @@
export { RemoveDrafts } from './draft'
export { ExplicitPublish } from './explicit'
export { RemoveDrafts } from "./draft"
export { ExplicitPublish } from "./explicit"