Update network/ipam/reference-content/ipv6.mdx

Author: RoRoJ

network/ipam/reference-content/ipv6.mdx

@@ -61,6 +61,10 @@ Scaleway Elastic Metal servers are compatible with IPv6.
 
 You can attach one or multiple public (flexible) IPv6 addresses to your Elastic Metal server, as well as, or instead of, a public IPv4 address. These public addresses are flexible, meaning that you can detach them from an Elastic Metal server, hold them in your account, and attach them to a different Elastic Metal server, if you want. Each flexible IPv6 address is a `/64` IPv6 subnet. Flexible IPv6 addresses can also be used as additional IP addresses to create virtual machines on your Elastic Metal server.
 
+<Message type="note">
+In addition to the possibility of attaching and detaching flexible IP addresses, note that each Elastic Message server also comes with a statically routed public IPv4 address, which cannot be detached, other than manually.
+</Message>
+
 #### Private IPv6 
 
 When you attach an Elastic Metal server to a Private Network, it gets both an IPv4 and an IPv6 address on that network.  You can either let IPAM auto-allocate any available address, or specify a [reserved IP address](/network/ipam/how-to/reserve-ip/) to use.