Remove link to dead tool

[Sandro]

Checklist

• I read and understood ASF's Contributing guidelines
• I also read Setting-up and FAQ, I don't need help, this is a wiki suggestion
• This is not a translation issue
• This is not ASF-ui wiki suggestion

Wiki page

https://github.com/JustArchiNET/ArchiSteamFarm/wiki/Third-party#tools

The issue

The keys extractor link redirect through several tracking sites all blocked by ublock origin and you end up somewhere in the internet. The current link is ske.uma.im which I found in the commit history of the repo.

Wrong text

No response

Suggested improvement

Update the link to ske.uma.im

Additional info

No response

[Łukasz Domeradzki]

Thanks, done, although I redirected to https://umaim.github.io/SKE