Add Easypanel deployment option to Getting Started KB article

Hi! AdGuard Home has an official one-click deployment template on Easypanel: https://easypanel.io/templates/adguardhome

I opened #8600 adding a short Easypanel mention to the README, but the main installation documentation lives in the Getting Started KB article (https://adguard-dns.io/kb/adguard-home/getting-started/), which isn't in this repo, so I couldn't open a PR against it directly.

Would it be possible to add a mention of the Easypanel deployment option there, alongside the Docker instructions? Happy to help with the copy if useful.