ci: Update image

We want to use images that include

 - appstreamcli and
 - desktop-file-validate

so that metainfo and desktop files are validated in CI.

Part-of: <https://gitlab.gnome.org/GNOME/calls/-/merge_requests/759>

.gitlab-ci.yml

@@ -22,7 +22,7 @@ workflow:
     - if: $CI_COMMIT_BRANCH
 
 variables:
-  DEBIAN_IMAGE: $CI_REGISTRY/gnome/calls/debian:v0.0.2024-08-30
+  DEBIAN_IMAGE: $CI_REGISTRY/gnome/calls/debian:v0.0.2024-09-15
   GIT_SUBMODULE_STRATEGY: normal
 
 build:native: