Modified comment to mark as deprecated in a uniform way - enum Direction

Author: MarcelOliver

osi_trafficsign.proto

@@ -9242,8 +9242,10 @@ message TrafficSign
 
                 // The direction to which the arrow points to
                 //
-                // May be deprecated or changed in the future.
-                // Discussions will continue in Harmonization OpenX group.
+                // \attention Deprecated: OpenDRIVE categorization for traffic signs is more generic than OSI enum
+                // (see <a href="https://releases.asam.net/OpenDRIVE/1.6.0/ASAM_OpenDRIVE_BS_V1-6-0.html#_signals">OpenDRIVE V1-6-0</a>).<br>
+                // How the enum Direction will be dealt in future will be discussed in Harmonization OpenX group.<br>
+                // Deprecated planned for version 4.0.0
                 enum Direction
                 {
                     // Direction of sign is unknown (must not be used in ground