Fix docstring for MyPath (#1587)

Follow-up to #1154 which changed its behavior.

Author: franzpoeschel

include/openPMD/backend/Attributable.hpp

@@ -222,7 +222,8 @@ class Attributable
          * Indicates where this Attributable may be found within its Series.
          * Prefixed by the accessed object, e.g.,
          *   "iterations", "100", "meshes", "E", "x"
-         * Notice that RecordComponent::SCALAR is included in this list, too.
+         * Notice that RecordComponent::SCALAR does not get included in this
+         * list.
          */
         std::vector<std::string> group;
         Access access;