add h1 to ipv6 docs

Author: topi314

docs/configuration/ipv6/index.md

@@ -2,6 +2,8 @@
 description: IPv6 related information.
 ---
 
+# IPv6
+
 Nowadays, most server providers will give you an IPv6 `/64` with a VPS for free. You can easily check by `ping6 google.com` or using `ip a` to check for an IPv6 address.
 
 If your hosting provider stated that they provide IPv6 but your server does not have one, kindly ask them about IPv6 and how to configure it. Sometimes, the server provider might require you to open a ticket for providing IPv6 to your server.