revert warning on models.service.Service.data

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

cyclonedx/model/__init__.py

@@ -73,6 +73,9 @@ class DataClassification:
     """
     This is our internal representation of the `dataClassificationType` complex type within the CycloneDX standard.
 
+    DataClassification might be deprecated since CycloneDX 1.5, but it is not deprecated in this library.
+    In fact, this library will try to provide a compatibility layer if needed.
+
     .. note::
         See the CycloneDX Schema for dataClassificationType:
         https://cyclonedx.org/docs/1.6/xml/#type_dataClassificationType