Update runtimes workflow to don't break when a file doe not exists

Author: atheo89

.github/workflows/runtimes-digest-updater-upstream.yaml

@@ -84,6 +84,12 @@ jobs:
 
             for ((i=0;i<${#PATHS[@]};++i)); do
               path=${PATHS[$i]}
+
+              if [[ ! -f "$path" ]]; then
+                echo "File $path does not exist. Skipping..."
+                continue
+              fi
+
               img=$(cat ${path} | jq -r '.metadata.image_name')
               name=$(echo "$path" | sed 's#.*runtime-images/\(.*\)-py.*#\1#')
               py_version=$(echo "$path" | grep -o 'python-[0-9]\.[0-9]')