Update list of no-Anticheat recommendations

[mihawk90]

Apex Legends has disabled Linux support about 2 years ago (see Twitter announcement).
The Apex Legends page has now also been updated to reflect this.

Consequently, we should not present users with Apex Legends as an alternative just to be greeted with the same Anti Cheat notice.

I chose Deadlock because.. why not, but if you prefer something else I can adjust it. Deadlock being a Valve game is extremely unlikely to ever be blocked though, so that's a bonus.

[mihawk90]

I just noticed something.
Before this could be merged with Deadlock, the Deadlock entry would require a cleanup.

There are currently 2 Deadlock entries in the Lutris database:

deadlock (which this PR initially referred to)
This is an entirely different game (see the linked steam store page), but it shows Valve as Developer/Publisher, and Valve's Deadlock Logo/Icon (but the correct poster).

deadlock--2
This is actually Valve's Deadlock, but it has neither Publisher/Developer information nor an icon.

I can submit change suggestions for each, but I'm not sure that's the best way?

There's also a third, but this appears to be correct.

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I have submitted change suggestions for both, please review them before merging this.

Also updated the PR accordingly to point to Valve's Deadlock (deadlock--2).

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Also, The Finals and Arc Raiders are also available since their respective launch. Helldivers 2 (not competitive, but then again neither is Warframe) has also been available since its launch. We could also add those.

[mihawk90]

I have submitted change suggestions for both, please review them before merging this.

Both have been accepted, so this PR is ready.
I also added the Steam screenshots yesterday since they don't require moderation.