fix: copy vars.yml only

roles/matrix-base/tasks/setup_matrix_base.yml

@@ -12,7 +12,7 @@
 
 - name: Preserve vars.yml on the server for easily restoring if it gets lost later on
   ansible.builtin.copy:
-    src: "{{ matrix_vars_yml_snapshotting_src }}"
+    src: "{{ matrix_vars_yml_snapshotting_src }}/vars.yml"
     dest: "{{ matrix_base_data_path }}/vars.yml"
     owner: "{{ matrix_user_username }}"
     group: "{{ matrix_user_groupname }}"