Modified comment to mark as deprecated in a uniform way - Actor actor

Signed-off-by: Marcel Sachse <msachse@pmsfit.de>

Author: MarcelOliver

osi_trafficsign.proto

@@ -5562,8 +5562,10 @@ message TrafficSign
             // bikes, cars, trucks and so on), that the supplementary sign
             // makes reference 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 actor will be dealt in future will be discussed in Harmonization OpenX group.<br>
+            // Deprecated planned for version 4.0.0
             repeated Actor actor = 5;
 
             // A direction arrow shown on the supplementary sign.