Fix condition for setting image name in update_image script

Author: m3hm3t

update_image

@@ -19,7 +19,7 @@ nprocs="${1:-1}"
 
 declare args
 
-if [ "${TEST}" == "true" ]; then
+if [ "${TEST}" == "false" ]; then
     image_name="packaging-test"
 else
     image_name="packaging"