correction

roles/custom/matrix-dendrite/templates/dendrite/dendrite.yaml.j2

@@ -382,6 +382,7 @@ user_api:
   # is considered to be valid in milliseconds.
   # The default lifetime is 3600000ms (60 minutes).
   # openid_token_lifetime_ms: 3600000
+  auto_join_rooms: {{ matrix_dendrite_userapi_auto_join_rooms | to_json }}
 
 # Not in dendrite-config.yaml, but is in build/docker/config/dendrite.yaml
 # Configuration for the Push Server API.
@@ -415,15 +416,3 @@ tracing:
 # stdout by Dendrite.
 logging: []
 
-# Users who register on this homeserver will automatically be joined to the rooms listed under "auto_join_rooms" option.
-# By default, any room aliases included in this list will be created as a publicly joinable room
-# when the first user registers for the homeserver. If the room already exists,
-# make certain it is a publicly joinable room, i.e. the join rule of the room must be set to 'public'.
-# As Spaces are just rooms under the hood, Space aliases may also be used.
-#auto_join_rooms:
-#  - "#main:matrix.org"
-
-{% if matrix_dendrite_auto_join_rooms|length > 0 %}
-auto_join_rooms:
-{{ matrix_dendrite_auto_join_rooms|to_nice_yaml(indent=2, width=999999) }}
-{% endif %}