Update dock.mau.dev/mautrix/gmessages Docker tag to v0.6.4

roles/custom/matrix-bridge-mautrix-gmessages/defaults/main.yml

@@ -18,7 +18,7 @@ matrix_mautrix_gmessages_container_image_self_build_repo: "https://github.com/ma
 matrix_mautrix_gmessages_container_image_self_build_branch: "{{ 'main' if matrix_mautrix_gmessages_version == 'latest' else matrix_mautrix_gmessages_version }}"
 
 # renovate: datasource=docker depName=dock.mau.dev/mautrix/gmessages
-matrix_mautrix_gmessages_version: v0.6.3
+matrix_mautrix_gmessages_version: v0.6.4
 
 # See: https://mau.dev/mautrix/gmessages/container_registry
 matrix_mautrix_gmessages_docker_image: "{{ matrix_mautrix_gmessages_docker_image_registry_prefix }}mautrix/gmessages:{{ matrix_mautrix_gmessages_version }}"