Make /matrix owned by matrix:matrix

roles/matrix-server/tasks/setup_main.yml

@@ -27,4 +27,5 @@
     owner: "{{ matrix_user_username }}"
     group: "{{ matrix_user_username }}"
   with_items:
+    - "{{ matrix_base_data_path }}"
     - "{{ matrix_synapse_base_path }}"