Force certbot to use Python 3

tasks/install.yml

@@ -17,3 +17,10 @@
     pkg: 'certbot'
     state: 'present'
     update_cache: yes
+
+- name: ""
+  lineinfile:
+    path: '/usr/local/bin/certbot'
+    regexp: '^#!/usr/bin/python$'
+    line: '#!/usr/bin/python3'
+  ignore_errors: yes