add maintainer

Signed-off-by: Mamoru Sobue <mamoru.sobue@tier4.jp>

Author: soblin

control/autonomous_emergency_braking/package.xml

@@ -7,6 +7,7 @@
   <maintainer email="takamasa.horibe@tier4.jp">Takamasa Horibe</maintainer>
   <maintainer email="tomoya.kimura@tier4.jp">Tomoya Kimura</maintainer>
   <maintainer email="mamoru.sobue@tier4.jp">Mamoru Sobue</maintainer>
+  <maintainer email="daniel.sanchez@tier4.jp">Daniel Sanchez</maintainer>
 
   <license>Apache License 2.0</license>