Merge pull request #840 from rstudio/pin-wgcw-to-ubuntu22

Pin WGCW build back to Ubuntu 22.04

Author: ianpittwood

workbench-for-google-cloud-workstations/Dockerfile.ubuntu2204

@@ -1,5 +1,5 @@
 FROM product-base-pro as posit_base
-FROM us-central1-docker.pkg.dev/cloud-workstations-images/predefined/base:latest as build
+FROM us-central1-docker.pkg.dev/cloud-workstations-images/predefined/base:last-ubuntu2204 as build
 
 ### ARG declarations ###
 ARG DEBIAN_FRONTEND=noninteractive