Upgrade Certbot (1.27 -> 1.28)

roles/matrix-nginx-proxy/defaults/main.yml

@@ -485,7 +485,7 @@ matrix_ssl_lets_encrypt_staging: false
 # Learn more here: https://eff-certbot.readthedocs.io/en/stable/using.html#changing-the-acme-server
 matrix_ssl_lets_encrypt_server: ''
 
-matrix_ssl_lets_encrypt_certbot_docker_image: "{{ matrix_container_global_registry_prefix }}certbot/certbot:{{ matrix_ssl_architecture }}-v1.27.0"
+matrix_ssl_lets_encrypt_certbot_docker_image: "{{ matrix_container_global_registry_prefix }}certbot/certbot:{{ matrix_ssl_architecture }}-v1.28.0"
 matrix_ssl_lets_encrypt_certbot_docker_image_force_pull: "{{ matrix_ssl_lets_encrypt_certbot_docker_image.endswith(':latest') }}"
 matrix_ssl_lets_encrypt_certbot_standalone_http_port: 2402
 matrix_ssl_lets_encrypt_support_email: ~