Fix typo in changelog.md: swapped Resource and Response.
Fix typo in changelog.md: swapped Resource and Response.

aeons/http4s,rossabaker/http4s,http4s/http4s,ChristopherDavenport/http4s,rossabaker/http4s,ChristopherDavenport/http4s,aeons/http4s,ChristopherDavenport/http4s,aeons/http4s