Bump eclipsecbi/fedora-gtk3-mutter in /container

Bumps eclipsecbi/fedora-gtk3-mutter from `27b25b4` to `29e256a`.

---
updated-dependencies:
- dependency-name: eclipsecbi/fedora-gtk3-mutter
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

container/Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipsecbi/fedora-gtk3-mutter:40-gtk3.24@sha256:27b25b4f4a053017a2db7d500218ae85d16922313404b653499d7dcbc93486b8
+FROM eclipsecbi/fedora-gtk3-mutter:40-gtk3.24@sha256:29e256a419e5d74a7f0294de976e9bf3a4954c9c5c917a475e97bb4305e1566c
 
 # Back to root for install
 USER 0