plabooks: Change the archweb db variable to point to archlinux.org

Change the archweb_db_host variable to point to archlinux.org instead of
apollo. This is of particular importance to gemini.

group_vars/mirrors.yml

 ---
-archweb_db_host: 'apollo.archlinux.org'
+archweb_db_host: 'archlinux.org'
 
 # raise tcp window limits to 32MiB
 tcp_rmem: "10240 87380 33554432"

playbooks/gemini.archlinux.org.yml

@@ -4,7 +4,7 @@
   hosts: gemini.archlinux.org
   remote_user: root
   vars:
-    archweb_db_host: 'apollo.archlinux.org'
+    archweb_db_host: 'archlinux.org'
     dbscripts_commit: '20191022'
   roles:
     - { role: common }

playbooks/tasks/pacman-website.yml

@@ -29,5 +29,5 @@
 
       - name: upload website
         unarchive: src={{ tempdir.path }}/pacman/pacman-{{ pacman_version }}/doc/website.tar.gz dest={{ archweb_dir }}/archlinux.org/pacman mode=0644
-        delegate_to: apollo.archlinux.org
+        delegate_to: archlinux.org