Generalized definition text of the wind

The message within the description was too specific, if in the future updates will probably have more than only the wind speed and direction in it.

Signed-off-by: Markus Waldmann <Markus.Waldmann@stud.hs-kempten.de>

Author: Markus Waldmann

osi_environment.proto

@@ -101,7 +101,7 @@ message EnvironmentalConditions
     //
     repeated ExternalReference source_reference = 9;
 
-    // Definition of the wind speed and direction.
+    // Definition of the wind properties
     //
     optional Wind wind = 11;