message: docs: fix "Edit this page on GitHub" links
diff: @@ -28,6 +28,7 @@ gh_edit_link: true
  gh_edit_link_text: "Edit this page on GitHub"
  gh_edit_repository: "https://github.com/coreos/zincati"
  gh_edit_branch: "master"
  +gh_edit_source: docs
  gh_edit_view_mode: "tree"
  compress_html:
  