Update linuxserver/ddclient Docker tag to v4

roles/custom/matrix-dynamic-dns/defaults/main.yml

@@ -8,7 +8,7 @@ matrix_dynamic_dns_enabled: true
 matrix_dynamic_dns_daemon_interval: '300'
 
 # renovate: datasource=docker depName=linuxserver/ddclient versioning=semver
-matrix_dynamic_dns_version: 3.11.2
+matrix_dynamic_dns_version: 4.0.0
 
 # The docker container to use when in mode
 matrix_dynamic_dns_docker_image: "{{ matrix_dynamic_dns_docker_image_name_prefix }}linuxserver/ddclient:{{ matrix_dynamic_dns_version }}"