fixed matrix_redis for migration

roles/custom/matrix-element-call/defaults/main.yml

@@ -16,12 +16,12 @@ matrix_element_call_container_network: "matrix_element_call_network"
 matrix_element_call_image: "ghcr.io/element-hq/element-call:latest"
 matrix_jwt_service_image: "ghcr.io/element-hq/lk-jwt-service:latest-ci"
 matrix_livekit_image: "livekit/livekit-server:latest"
-matrix_redis_image: "redis:6-alpine"
+redis_image: "redis:6-alpine"
 
 # Ports
 matrix_element_call_port: "8093"
 matrix_jwt_service_port: "8881"
-matrix_redis_port: "6379"
+redis_port: "6379"
 
 # LiveKit configuration (should be set in host_vars or globally)
 matrix_element_call_livekit_dev_key: "{{ matrix_livekit_dev_key | default('unset-livekit-key') }}"