put why ipv6 is blocked for ipv6 us

docs/configuration/ipv6/hetzner.md

@@ -2,6 +2,8 @@
 description: How to configure IPv6 on your Hetzner VPS.
 ---
 
+# US locations for hetzner blockeds ipv6 rotation 
+
 Setting up IPv6 for Lavalink on a Hetzner VPS is just 3 commands. The VPS comes with a /64 address to use and already has IPv6 enabled for you.
 
 This how-to may depend on your system's OS, but it has already been tested on `Ubuntu` and `Debian`.
@@ -26,4 +28,4 @@ ping6 -I 1234:1234:1234:: -c 2 google.com
 ping6 -I 1234:1234:1234::1 -c 2 google.com
 ping6 -I 1234:1234:1234::2 -c 2 google.com
 ping6 -I 1234:1234:1234:dead:beef:1234:1234 -c 2 google.com
-```
+```