Mutter stopped hardcoding a non-default user in the image, and
instead wraps its CI tests to run as user. Pull in that image
to hopefully get over some of the recent CI hickups.
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2813>
- 'api_failure'
variables:
- MUTTER_CI_IMAGE: registry.gitlab.gnome.org/gnome/mutter/fedora/38:x86_64-2023-06-19.1
+ MUTTER_CI_IMAGE: registry.gitlab.gnome.org/gnome/mutter/fedora/38:x86_64-2023-06-20.2
FDO_UPSTREAM_REPO: GNOME/gnome-shell
BUNDLE: "extensions-git.flatpak"
LINT_LOG: "eslint-report.xml"