Pin WGCW build back to Ubuntu 22.04

ianpittwood · ianpittwood · commit ededfde3f88f · 2024-09-16T13:34:04.000-06:00
diff --git a/workbench-for-google-cloud-workstations/Dockerfile.ubuntu2204 b/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
