Document matrix_ma1sd_docker_src_files_path naming

roles/matrix-ma1sd/defaults/main.yml

@@ -11,6 +11,7 @@ matrix_ma1sd_docker_image: "ma1uta/ma1sd:2.4.0-{{ matrix_ma1sd_architecture }}"
 matrix_ma1sd_docker_image_force_pull: "{{ matrix_ma1sd_docker_image.endswith(':latest') }}"
 
 matrix_ma1sd_base_path: "{{ matrix_base_data_path }}/ma1sd"
+# We need the docker src directory to be named ma1sd. See: https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/588
 matrix_ma1sd_docker_src_files_path: "{{ matrix_ma1sd_base_path }}/docker-src/ma1sd"
 matrix_ma1sd_config_path: "{{ matrix_ma1sd_base_path }}/config"
 matrix_ma1sd_data_path: "{{ matrix_ma1sd_base_path }}/data"