fix(www): Fixes collapsible component (#12517) (#13673)
fix(www): Fixes collapsible component (#12517) (#13673)

Fixes the collapsible component so it doesn't disappear completely when collapsed.
gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby