Require at least one year membership for member tickets (#222)

Signed-off-by: Kim Brose <2803622+HarHarLinks@users.noreply.github.com>

Author: HarHarLinks

src/pages/register.astro

@@ -110,6 +110,7 @@ import Tickets from "../components/Tickets.astro";
                         href="mailto:conference@foundation.matrix.org?subject=MC26%20Member%20Ticket"
                         >conference@foundation.matrix.org</a
                     > to receive your free Member Ticket voucher.
+                    You need to have committed to at least one year membership.
                 </p>
             </div>
             <div class="item smol">