Bump ubuntu

Bumps ubuntu from `77906da` to `1b8d8ff`.

---
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@sha256:77906da86b60585ce12215807090eb327e7386c8fafb5402369e421f44eff17e
+FROM ubuntu:22.04@sha256:1b8d8ff4777f36f19bfe73ee4df61e3a0b789caeff29caa019539ec7c9a57f95
 
 ### user name recognition at runtime w/ an arbitrary uid - for OpenShift deployments
 COPY scripts/uid_entrypoint /usr/local/bin/uid_entrypoint