Fix project create missing responsible flag

src/coscine/client.py

@@ -706,6 +706,13 @@ class ApiClient:
         parent_id
             Parent project ID if the project should be a subproject.
         """
+        org_data = [
+            organization.serialize()
+            for organization in organizations
+        ]
+        for item in org_data:
+            item["responsible"] = True
+        print(org_data)
         data: dict = {
             "name": name,
             "displayName": display_name,
@@ -717,10 +724,7 @@ class ApiClient:
                 discipline.serialize()
                 for discipline in disciplines
             ],
-            "organizations": [
-                organization.serialize()
-                for organization in organizations
-            ],
+            "organizations": org_data,
             "visibility": visibility.serialize(),
             "keywords": keywords if keywords else [],
             "grantId": grant_id