Cirrus: Use updated VM images

Mainly this is to confirm some changes needed for the podman-py CI
setup don't disrupt operations here. Ref:

containers/automation_images#111

Signed-off-by: Chris Evich <cevich@redhat.com>

.cirrus.yml

@@ -29,7 +29,7 @@ env:
     PRIOR_FEDORA_NAME: "fedora-34"
     UBUNTU_NAME: "ubuntu-2110"
 
-    IMAGE_SUFFIX: "c4560539387953152"
+    IMAGE_SUFFIX: "c4764556961513472"
     FEDORA_CACHE_IMAGE_NAME: "fedora-${IMAGE_SUFFIX}"
     PRIOR_FEDORA_CACHE_IMAGE_NAME: "prior-fedora-${IMAGE_SUFFIX}"
     UBUNTU_CACHE_IMAGE_NAME: "ubuntu-${IMAGE_SUFFIX}"