Install dnscrypt-proxy from ubuntu repos (#1859)

roles/dns/tasks/ubuntu.yml

@@ -1,4 +1,5 @@
 ---
+- block:
   - name: Add the repository
     apt_repository:
       state: present
@@ -9,12 +10,6 @@
     retries: 10
     delay: 3
 
-- name: Install dnscrypt-proxy
-  apt:
-    name: dnscrypt-proxy
-    state: present
-    update_cache: true
-
   - name: Configure unattended-upgrades
     copy:
       src: 50-dnscrypt-proxy-unattended-upgrades
@@ -22,6 +17,13 @@
       owner: root
       group: root
       mode: 0644
+  when: ansible_facts['distribution_version'] is version('20.04', '<')
+
+- name: Install dnscrypt-proxy
+  apt:
+    name: dnscrypt-proxy
+    state: present
+    update_cache: true
 
 - block:
   - name: Ubuntu | Configure AppArmor policy for dnscrypt-proxy