ci(docker): add the rq.redis_url option in the pyramid.ini template

Without this option, the rq-worker cannot be launched.

pyramid.ini.j2

@@ -9,6 +9,7 @@
 cubicweb.auth.authtkt.persistent.path = {{ PYRAMID_AUTHTKT_SESSION_PATH or '/' }}
 cubicweb_api.enable_login_route = {{ PYRAMID_API_ENABLE_LOGIN_ROUTE or "no" }}
 {% if REDIS_SESSIONS_URL -%}
+rq.redis_url = {{ REDIS_SESSIONS_URL }}
 redis.sessions.url = {{ REDIS_SESSIONS_URL }}
 redis.sessions.secret = {{ REDIS_SESSIONS_SECRET }}
 redis.sessions.timeout = 1200