CI: Update Circle image

effigies · effigies · commit 35b6435b39df · 2022-03-28T20:12:05.000-04:00
diff --git a/.circleci/config.yml b/.circleci/config.yml
@@ -307,7 +307,7 @@ jobs:
 
   test_masks:
     machine:
-      image: ubuntu-1604:202007-01
+      image: ubuntu-2004:202104-01
     working_directory: /tmp/masks
     steps:
       - attach_workspace:
