Docs fixes

[andreion1ca]

[iulianatodoran]

Checks in the latest Staging documentation

• ✅ For Unreal SDK in Get Started > Set up the AltTester® Unreal SDK in your project > the Plugin screenshot ant title text contains the ®️ symbol
• ✅ For Unity SDK the KeyDown command from API > AltDriver > Input Actions > KeyDown has the power parameter not required
• ✅ For Unity SDK the instrumented app screenshot from AltTester Editor > Build Settings has version updated to 2.2.0

Conclusion

Considering the above, I will move the ticket to Done.