infra: fix ci failure (#12871)

Signed-off-by: David Korczynski <[email protected]>

Author: DavidKorczynski

.github/workflows/project_tests.yml

@@ -68,7 +68,7 @@ jobs:
           sudo swapoff -a
           sudo rm -f /swapfile
           sudo apt clean
-          docker rmi $(docker images -a -q)
+          docker rmi $(docker images -a -q) || true
           df -h
           echo "Remove large unused folders, inspired by https://github.com/apache/flink/blame/master/tools/azure-pipelines/free_disk_space.sh"
           sudo bash -c '(ionice -c 3 nice -n 19 rm -rf /usr/share/dotnet/ /usr/local/graalvm/ /usr/local/.ghcup/ /usr/local/share/powershell /usr/local/share/chromium /usr/local/lib/android /usr/local/lib/node_modules)&'