ci: Update podman

For heredocs

Signed-off-by: Colin Walters <[email protected]>

Author: cgwalters

.github/workflows/ci.yml

@@ -28,6 +28,13 @@ jobs:
     runs-on: [ "${{ matrix.runner }}" ]
 
     steps:
+      - name: Get a newer podman for heredoc support (from debian testing)
+        run: |
+          set -eux
+          echo 'deb [trusted=yes] https://ftp.debian.org/debian/ testing main' | sudo tee /etc/apt/sources.list.d/testing.list
+          sudo apt update
+          sudo apt install -y crun/testing podman/testing skopeo/testing
+
       - uses: actions/checkout@v4
 
       - name: Install podman