fix: use joinSegments for `contentIndex.json` file path (#702)

kabirgh

2024-01-16 e17ff202449635af29ef0056886e472a2615708b

 quartz/plugins/emitters/index.ts

@@ -7,3 +7,4 @@
export { Static } from "./static"
export { ComponentResources } from "./componentResources"
export { NotFoundPage } from "./404"
export { CNAME } from "./cname"