build(autoware_overlay_rviz_plugin): add missing ament_cmake_auto dependency (#6519)

Signed-off-by: Esteve Fernandez <esteve@apache.org>
Signed-off-by: Kotaro Yoshimoto <pythagora.yoshimoto@gmail.com>

Author: esteve

common/autoware_overlay_rviz_plugin/autoware_overlay_rviz_plugin/package.xml

@@ -23,7 +23,7 @@
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>autoware_lint_common</test_depend>
 
-  <buildtool_depend>ament_cmake</buildtool_depend>
+  <buildtool_depend>ament_cmake_auto</buildtool_depend>
 
   <export>
     <build_type>ament_cmake</build_type>