Downgrade Ubuntu to 20.04 in "deploy" CI jobs

Author: alexjpwalker

.factory/automation.yml

@@ -189,7 +189,7 @@ build:
         bazel run @vaticle_dependencies//distribution/artifact:create-netrc
         bazel test //tests/integration:test_cluster_failover --test_output=errors
     deploy-pip-snapshot:
-      image: vaticle-ubuntu-22.04
+      image: vaticle-ubuntu-20.04
       dependencies: [
         build,
         test-behaviour-connection-core,
@@ -254,7 +254,7 @@ release:
         export DEPLOY_GITHUB_TOKEN=$REPO_GITHUB_TOKEN
         bazel run --define version=$(cat VERSION) //:deploy-github -- $GRABL_COMMIT
     deploy-pip-release:
-      image: vaticle-ubuntu-22.04
+      image: vaticle-ubuntu-20.04
       command: |
         export PATH="$HOME/.local/bin:$PATH"
         sudo apt install python3-pip -y