Merge pull request 'Add a note about giving the Zerotier network a better name' (#3876) from jfly/clan-core:add-note-about-vpn-name into main

Reviewed-on: https://git.clan.lol/clan/clan-core/pulls/3876

docs/site/guides/mesh-vpn.md

@@ -35,6 +35,11 @@ This guide shows you how to configure `zerotier` either through `NixOS Options`
     - The `new_machine` machine, which is the machine we want to add to the vpn network.
 
     ## 2. Configure the Inventory
+
+    Note: consider picking a more descriptive name for the VPN than "default".
+    It will be added as an altname for the Zerotier virtual ethernet interface, and
+    will also be visible in the Zerotier app.
+
     ```nix
     clan.inventory = {
       services.zerotier.default = {