feat(autoware_launch): ext_lane_change -> external_lane_change in rtc (#274)

* fix

Signed-off-by: Takayuki Murooka <[email protected]>

* empty commit

Signed-off-by: Takayuki Murooka <[email protected]>

---------

Signed-off-by: Takayuki Murooka <[email protected]>

Author: takayuki5168

autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/rtc_auto_mode_manager/rtc_auto_mode_manager.param.yaml

@@ -7,8 +7,8 @@
       - "intersection"
       - "no_stopping_area"
       - "traffic_light"
-      - "ext_request_lane_change_left"
-      - "ext_request_lane_change_right"
+      - "external_request_lane_change_left"
+      - "external_request_lane_change_right"
       - "lane_change_left"
       - "lane_change_right"
       - "avoidance_left"