chore(simple_planning_simulator): add maintainer (#7026)

Signed-off-by: Zulfaqar Azmi <zulfaqar.azmi@tier4.jp>

Author: zulfaqar-azmi-t4

simulator/simple_planning_simulator/package.xml

@@ -6,6 +6,10 @@
   <description>simple_planning_simulator as a ROS 2 node</description>
   <maintainer email="takamasa.horibe@tier4.jp">Takamasa Horibe</maintainer>
   <maintainer email="tomoya.kimura@tier4.jp">Tomoya Kimura</maintainer>
+  <maintainer email="maxime.clement@tier4.jp">Maxime Clement</maintainer>
+  <maintainer email="mamoru.sobue@tier4.jp">Mamoru Sobue</maintainer>
+  <maintainer email="zulfaqar.azmi@tier4.jp">Zulfaqar Azmi</maintainer>
+  <maintainer email="temkei.kem@tier4.jp">Temkei Kem</maintainer>
   <license>Apache License 2.0</license>
 
   <buildtool_depend>ament_cmake_auto</buildtool_depend>