allows user to view deprecated lessons that are otherwise blocked
there are lessons on Unity Learn that are considered outdated, and you will be denied access to them, example
however, these lessons may still contain useful information, and the user should be able to decide whether to view them
the warning message for outdated lessons looks like this:
"Sorry, this learning content is no longer available.
This content has been removed, but don’t worry – you can still continue your learning journey with the content below, which covers many of the same topics and skills..."
this script will allow the above message to be displayed for 3 seconds (to inform the user), and then removes the blocks
