ci: rebuild on quays image miss (#70)

Author: demo-exe

build/try-pull-docker-image.sh

@@ -2,7 +2,7 @@
 
 echo "Trying to pull cached image: ${1}" > /dev/stderr
 if ! PULL_ERR="$(docker pull "${1}" 2>&1 >/dev/null)"; then
-    if echo "${PULL_ERR}" | grep -q "unknown"; then
+    if echo "${PULL_ERR}" | grep -qE "(unknown|not found)"; then
         echo "Cached image: ${1} was not present" > /dev/stderr
         exit 2
     else