ci: add ubuntu/crun workaround to release workflow (like ci+qa)

Thanks for the pointer, Andreas!

.github/workflows/release.yml

@@ -47,6 +47,13 @@ jobs:
         run: |
           python3 -c 'import yaml' || pip3 install pyyaml
           mkdir -p artifacts/build artifacts/test
+          touch artifacts/build/.keep
+          # crun >= 1.9.1 is required on Ubuntu 20.04.6
+          # this workaround came from ...
+          # https://github.com/kubernetes-sigs/kind/pull/3527
+          curl -sLo /tmp/crun https://github.com/containers/crun/releases/download/1.14.3/crun-1.14.3-linux-amd64
+          chmod +x /tmp/crun
+          sudo cp /tmp/crun /usr/bin/crun
 
           build/ci/ci-run.py ${{ matrix.platform }} setup