Update roles/custom/matrix-dendrite/defaults/main.yml

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

roles/custom/matrix-dendrite/defaults/main.yml

@@ -195,4 +195,4 @@ matrix_dendrite_configuration_extension: "{{ matrix_dendrite_configuration_exten
 # You most likely don't need to touch this variable. Instead, see `matrix_dendrite_configuration_yaml`.
 matrix_dendrite_configuration: "{{ matrix_dendrite_configuration_yaml | from_yaml | combine(matrix_dendrite_configuration_extension, recursive=True) }}"
 
-auto_join_rooms: []
+matrix_dendrite_userapi_auto_join_rooms: []