added the ubuntu vm

.circleci/config.yml

@@ -3,6 +3,11 @@ version: 2.1
 orbs:
   kurtosis-docs-checker: kurtosis-tech/docs-checker@0.2.0
 
+executors:
+  ubuntu_vm:
+    machine:
+      image: ubuntu-2004:202201-02
+
 # NOTE: Because CircleCI jobs run on separate machines from each other, we duplicate steps (like checkout) between jobs. This is because doing the "correct" DRY
 #  refactoring of, "one job for checkout, one job for build Docker image, etc." would require a) persisting files between jobs and b) persisting Docker images between
 #  jobs. Both are annoying (saving/loading workspaces require re-downloading the workspace over the network, and there doesn't seem to be a good way to do Docker