fix getFileExtension missing numeric extensions (e.g. mp4)

Jacky Zhao

2023-08-09 e4950e06a15e34134b9feb064749748080bd59a1

 quartz/plugins/emitters/index.ts

@@ -5,3 +5,4 @@
export { AliasRedirects } from "./aliases"
export { Assets } from "./assets"
export { Static } from "./static"
export { ComponentResources } from "./componentResources"