Fix create_project() responsible field missing

src/coscine/__about__.py

@@ -12,4 +12,4 @@ Coscine Python SDK package metadata
 __author__ = "RWTH Aachen University"
 __copyright__ = "RWTH Aachen University"
 __license__ = "MIT License"
-__version__ = "0.11.8"
+__version__ = "0.11.9"

src/coscine/client.py

@@ -719,7 +719,9 @@ class ApiClient:
         if additional_organizations is None:
             additional_organizations = []
         for org in additional_organizations:
-            organizations.append(org.serialize())
+            data = org.serialize()
+            data["responsible"] = False
+            organizations.append(data)
         data: dict = {
             "name": name,
             "displayName": display_name,