chore(obstacle_cruise_planner): add maintainer (#9077)

Author: Berkay Karaman

planning/autoware_obstacle_cruise_planner/package.xml

@@ -8,6 +8,7 @@
   <maintainer email="kosuke.takeuchi@tier4.jp">Kosuke Takeuchi</maintainer>
   <maintainer email="satoshi.ota@tier4.jp">Satoshi Ota</maintainer>
   <maintainer email="yuki.takagi@tier4.jp">Yuki Takagi</maintainer>
+  <maintainer email="berkay@leodrive.ai">Berkay Karaman</maintainer>
 
   <license>Apache License 2.0</license>