[epiphany] (7 commits) Non-fast-forward update to branch wip/exalm/gtk4

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/gtk4' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  88382a5... WIP: Port to GTK4

Commits added to the branch:

  4d6819e... reader-handler: fix double free of error (*)
  8659347... Update Bulgarian translation (*)
  113eb52... session: validate active-tab before trying to use it (*)
  2ac8760... ci: pull alpine:latest before building image (*)
  3201f52... ci: unbreak CI image generation with latest alpine (*)
  b81806d... find-toolbar: Remove dead code (*)
  fd14345... WIP: Port to GTK4

(*) This commit already existed in another branch; no separate mail sent