Fixed error when pressing `enter` inside a caption
Fixed error when pressing `enter` inside a caption

refs https://github.com/TryGhost/Admin/commit/a30e8b15f5a8de7d03fd2daa8f14dfaecbfc9ef1

- added an optional options param to `addParagraphAfterCard` but was missing a default value meaning the destructuring errored when the param wasn't provided

TryGhost/Ghost-Admin,TryGhost/Ghost-Admin