Update TISS API from v2.2 to v2.3

The older API versions will be discontinued on 2025-01-31. The "changelog" email does not mention anything that should concern us other than the API version number in the URL. A quick test confirmed this.

invenio_config_tuw/tiss/utils.py

@@ -17,7 +17,7 @@ from .models import Employee, OrgUnit
 def _get_org_unit_dict(code: str) -> dict:
     """Fetch the data about the org unit from TISS."""
     response = requests.get(
-        f"https://tiss.tuwien.ac.at/api/orgunit/v22/code/{code}?persons=true"
+        f"https://tiss.tuwien.ac.at/api/orgunit/v23/code/{code}?persons=true"
     )
     # NOTE: some org units don't seem to have an OID
     #       (e.g. "E366t1 - Institutsbibliothek"),