The aluminum version would be preferred, but what you linked will do just fine. I can’t find a small tin of the aluminum version on Amazon, so don’t bother overspending on a large container.
If you are going up a thread size, make sure you get the appropriate drill bit. You need to drill out the hole before tapping. M5 usually calls for a 4.2mm predrill.
The whole point of captchas is to train bots. Did you think they were all road object and optical character recognition based because those are the categories humans really excel at?