Make deploy-pip-snapshot use Ubuntu 20.04

Author: lolski

.factory/automation.yml

@@ -66,7 +66,7 @@ build:
       filter:
         owner: vaticle
         branch: master
-      image: vaticle-ubuntu-22.04
+      image: vaticle-ubuntu-20.04
       type: foreground
       command: | 
         export DEPLOY_PIP_USERNAME=$REPO_VATICLE_USERNAME