[client] Fix windows registry observable creation (OpenCTI-Platform#974)

Author: Typ-ix

pycti/entities/opencti_stix_cyber_observable.py

@@ -948,7 +948,7 @@ def create(self, **kwargs):
                     ),
                 }
             elif type == "Windows-Registry-Value-Type":
-                input_variables["WindowsRegistryKeyValueType"] = {
+                input_variables["WindowsRegistryValueType"] = {
                     "name": (
                         observable_data["name"] if "name" in observable_data else None
                     ),