mapping: add @capsinthehouse

[@capsinthehouse](https://twitter.com/capsinthehouse) is one of our accounts. We've [decided](https://bots.reinhart1010.id/notes/98zejd7qmn) to archive this account alongside [@reinhart1010](https://twitter.com/reinhart1010) and [@alterine0101](https://twitter.com/alterine0101) - which are currently under progress.

mapping.js

@@ -40,4 +40,5 @@ export const mapping = {
 	"sentience": "https://kevinyank.com/twitter/",
 	"cjtype": "https://twitterarchive.cjtype.com/",
 	"jed_fox1": "https://tweets.jedfox.com",
+	"capsinthehouse": "http://capsinthehouse.twitter-archive.reinhart1010.id",
 };