feat: use multithread for traffic light container as default (autowar…

…efoundation#995)

Signed-off-by: tomoya.kimura <tomoya.kimura@tier4.jp>
Signed-off-by: ktro2828 <kotaro.uetake@tier4.jp>

launch/tier4_perception_launch/launch/traffic_light_recognition/traffic_light.launch.xml

@@ -23,7 +23,7 @@
     <arg name="input/image" value="$(var input/image)"/>
     <arg name="enable_fine_detection" value="$(var enable_fine_detection)"/>
     <arg name="use_intra_process" value="true"/>
-    <arg name="use_multithread" value="false"/>
+    <arg name="use_multithread" value="true"/>
   </include>
 
   <!-- visualizer -->