install podman-plugins for dns

Author: sjpb

.github/workflows/ci.yml

@@ -70,6 +70,9 @@ jobs:
             scenario: test15
 
     steps:
+      - name: Install packages
+        run: sudo apt-get install -y podman-plugins
+
       - name: Check out the codebase.
         uses: actions/checkout@v3