Bump ubuntu

Bumps ubuntu from `9b8dec3` to `2b7412e`.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-type: direct:production
...

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

cje-production/dockerfiles/ubuntu-gtk3-metacity/22.04-gtk3/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:22.04@sha256:9b8dec3bf938bc80fbe758d856e96fdfab5f56c39d44b0cff351e847bb1b01ea
+FROM ubuntu:22.04@sha256:2b7412e6465c3c7fc5bb21d3e6f1917c167358449fecac8176c6e496e5c1f05f
 
 ### user name recognition at runtime w/ an arbitrary uid - for OpenShift deployments
 COPY scripts/uid_entrypoint /usr/local/bin/uid_entrypoint