Update data from GH
Update data from GH

Includes the previous two commits;
 - fixing some GHE links
 - adding a missing FE app

Also includes updates to GH repo descriptions that've been made since
this was last run

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs