Use the real ml email address instead of alias

All the arch-x@archlinux.org -> arch-x@lists.archlinux.org aliases will
be dropped soon[1].

[1] https://lists.archlinux.org/pipermail/arch-dev-public/2021-June/030462.html

conf/config.defaults

@@ -22,7 +22,7 @@ git_clone_uri_anon = https://aur.archlinux.org/%s.git
 git_clone_uri_priv = ssh://aur@aur.archlinux.org/%s.git
 max_rpc_results = 5000
 max_depends = 1000
-aur_request_ml = aur-requests@archlinux.org
+aur_request_ml = aur-requests@lists.archlinux.org
 request_idle_time = 1209600
 request_archive_time = 15552000
 auto_orphan_age = 15552000

test/setup.sh

@@ -26,7 +26,7 @@ name = aur.db
 
 [options]
 aur_location = https://aur.archlinux.org
-aur_request_ml = aur-requests@archlinux.org
+aur_request_ml = aur-requests@lists.archlinux.org
 enable-maintenance = 0
 maintenance-exceptions = 127.0.0.1
 commit_uri = https://aur.archlinux.org/cgit/aur.git/log/?h=%s&id=%s