github actions: Disable podman builds

Ubuntu 20.04 has an unfortunate circumstance where docker is rejecting
podman because podman is using an older API version (1.22). It's not
really possible for us to upgrade podman, or make docker accept the
older API, so disable the podman tests

.github/workflows/main.yml

@@ -73,12 +73,12 @@ jobs:
           - {image: ubuntu-18.04-oegarmin,  provider: docker, sh: bash}
           - {image: ubuntu-20.04-base,      provider: docker, sh: bash}
           - {image: ubuntu-20.04-oe,        provider: docker, sh: bash}
-          - {image: ubuntu-20.04-oe,        provider: podman, sh: bash}
+          #- {image: ubuntu-20.04-oe,        provider: podman, sh: bash}
           - {image: ubuntu-20.04-oetest,    provider: docker, sh: bash}
           - {image: ubuntu-20.04-oegarmin,  provider: docker, sh: bash}
           - {image: ubuntu-22.04-base,      provider: docker, sh: bash}
           - {image: ubuntu-22.04-oe,        provider: docker, sh: bash}
-          - {image: ubuntu-22.04-oe,        provider: podman, sh: bash}
+          #- {image: ubuntu-22.04-oe,        provider: podman, sh: bash}
           - {image: ubuntu-22.04-oegarmin,  provider: docker, sh: bash}
 
     runs-on: ubuntu-20.04