Update Tailscale VPN description

[brixj]

I was looking for a solution to provide a static, public IP address for LND routing with Umbrel, and given the description of the Tailscale app, thought it would make this easy:

Tailscale will assign your Umbrel a stable IP and an auto-assigned domain that stays consistent, no matter what network your Umbrel is connected to.

This should be reworded to make it clear that the IP address provided is a non-routable, private IP address, only available to other devices connected to the Tailscale network.

[Darth-Coin]

Here you have a detailed guide how to use Tailscale on Umbrel https://community.getumbrel.com/t/how-to-use-umbrel-with-tailscale/

[jimbrend]

May I ask what are you trying to accomplish with more context @brixj ?

[al-lac]

Closing this for now, if any more clarification is needed in the description, we can re-open the issue. Feel free to open a PR if you have a better wording for the description.