Removed a few syntax bugs in Archlinux configuration

roles/matrix-base/tasks/server_base/setup_archlinux.yml

@@ -13,7 +13,7 @@
     update_cache: yes
 
 - name: Ensure Docker is installed
-  apt:
+  pacman:
     name:
       - docker
     state: latest

roles/matrix-nginx-proxy/tasks/ssl/setup_ssl_self_signed.yml

@@ -22,7 +22,7 @@
       - openssl
     state: latest
     update_cache: no
-  when: "matrix_ssl_retrieval_method == 'self-signed' and ansible_distribution == 'Archlinux'
+  when: "matrix_ssl_retrieval_method == 'self-signed' and ansible_distribution == 'Archlinux'"
 
 - name: Generate self-signed certificates
   include_tasks: "{{ role_path }}/tasks/ssl/setup_ssl_self_signed_obtain_for_domain.yml"

roles/matrix-synapse/tasks/ext/synapse-simple-antispam/setup_install.yml

@@ -22,7 +22,7 @@
   when: "ansible_os_family == 'Debian'"
 
 - name: Ensure git installed (Archlinux)
-  pacman
+  pacman:
     name:
       - git
     state: present