docs: Fix cut-and-paste error in Mailinglist.md archive link

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/docs/Mailinglist.md b/docs/Mailinglist.md
index 0322d17..68cdd15 100644
--- a/docs/Mailinglist.md
+++ b/docs/Mailinglist.md
@@ -8,7 +8,7 @@
 <https://mail.coreboot.org/hyperkitty/list/seabios@seabios.org/>
 
 Messages prior to January 2019 are archived at:
-<http://www.seabios.org/mailman/listinfo/seabios/>
+<http://www.seabios.org/pipermail/seabios/>
 
 An unofficial archive is also available at:
 <https://www.mail-archive.com/seabios@seabios.org/>