chore(tier4_localization_launch): add maintainer (#6350)

add maintainer

Signed-off-by: Yamato Ando <yamato.ando@tier4.jp>

Author: YamatoAndo

launch/tier4_localization_launch/package.xml

@@ -11,6 +11,7 @@
   <maintainer email="anh.nguyen.2@tier4.jp">NGUYEN Viet Anh</maintainer>
   <maintainer email="taiki.yamada@tier4.jp">Taiki Yamada</maintainer>
   <maintainer email="shintaro.sakoda@tier4.jp">Shintaro Sakoda</maintainer>
+  <maintainer email="masahiro.sakamoto@tier4.jp">Masahiro Sakamoto</maintainer>
   <license>Apache License 2.0</license>
   <author email="yamato.ando@tier4.jp">Yamato Ando</author>