Add |to_json to some variables

roles/matrix-ma1sd/defaults/main.yml

@@ -89,8 +89,8 @@ matrix_ma1sd_configuration_yaml: |
   #jinja2: lstrip_blocks: True
   matrix:
     domain: {{ matrix_domain }}
-    v1: {{ matrix_ma1sd_v1_enabled }}
-    v2: {{ matrix_ma1sd_v2_enabled }}
+    v1: {{ matrix_ma1sd_v1_enabled|to_json }}
+    v2: {{ matrix_ma1sd_v2_enabled|to_json }}
 
   server:
     name: {{ matrix_server_fqn_matrix }}