Changing the GHES hostname will invalidate all security keys (#48544)

Co-authored-by: Rachael Rose Renk <[email protected]>
Co-authored-by: mc <[email protected]>
Co-authored-by: Sophie <[email protected]>

Author: 4 people

data/reusables/enterprise_installation/changing-hostname-not-supported.md

@@ -1,5 +1,5 @@
 {% warning %}
 
-**Warning**: Do not change the hostname for {% data variables.product.prodname_ghe_server %} after initial setup. Changing the hostname will cause unexpected behavior, up to and including instance outages. If you have changed the hostname for your instance and are experiencing problems, contact GitHub Enterprise Support or GitHub Premium Support.
+**Warning**: Do not change the hostname for {% data variables.product.prodname_ghe_server %} after initial setup. Changing the hostname will cause unexpected behavior, up to and including instance outages and invalidation of users' security keys. If you have changed the hostname for your instance and are experiencing problems, contact {% data variables.contact.enterprise_support %} or {% data variables.contact.premium_support %}.
 
 {% endwarning %}