Fix small typo in using_docker_images.md, file is called `build_script` (using underscore)
What does this MR do?
This MR fixes a very small typo in the using_docker_images.md documentation, a space was used in the filename build_script
while it should be an underscore. Not sure of a MR is the best way to get this changed, trying it anyway :).
Moving docs to a new location?
No