Example Hub Ad List (Simple-Station#1356)

# Description

this PR extends the list of default advertiser hubs to include every
existing hub except for SSMV(Which is mutually exclusive with the
others). If there are more hubs I have missed, please let me know. This
will allow our servers to appear on as many hubs as possible.

Resources/ConfigPresets/EinsteinEngines/default.toml

@@ -18,7 +18,7 @@ lobbyduration      = 240
 
 [hub]
 tags = "lang:en-US,region:am_n_e,rp:med"
-hub_urls = "https://hub.spacestation14.com/"
+hub_urls = "https://hub.spacestation14.com/, https://web.networkgamez.com/, https://hub.singularity14.co.uk/"
 
 [ic]
 flavor_text = true