Update extract_gtn_tutorials.py

Author: scorreard

sources/bin/extract_gtn_tutorials.py

@@ -16,6 +16,7 @@
 import yaml
 import yt_dlp
 from owlready2 import get_ontology
+from ruamel.yaml import YAML as ruamelyaml
 
 PLAUSIBLE_REQUEST_NB = 0