tweak(web/standalone/deployer.ejs) update keymaster link to new portal

[Gravxd]

No description provided.

[Misha0717]

Dupe of #1016

[tabarra]

Yes, dupe, but the other is "stale" (well, one week).
If you implement the change requested I merge this one instead.

I think it's a good opportunity to include a link to the new docs page:
https://support.cfx.re/hc/en-us/articles/16539369935900-How-to-create-a-registration-key

On a quick note, small stuff like this I usually prefer just doing myself, and actually had already done the change but didn't commit.
But I'm happy to merge community PRs, and community members are usually happy to help so I'm fine with accepting PRs instead.

[Gravxd]

Didn't see another PR, mb on the dupe - link is updated as requested though

[tabarra]

The link was correct 😝
What I meant was also adding a link to the docs, like a For more information, read the [documentation](https://...), or even just (docs) with a link.

[Gravxd]

Something like this?