Merge branch '23-extra-lessons-are-imported-without-school-terms-linked' into 'master'

Resolve "Extra lessons are imported without linked school terms"

Closes #23

See merge request !67

aleksis/apps/untis/util/mysql/importers/substitutions.py

@@ -192,6 +192,7 @@ def import_substitutions(
                             "subject": subject,
                             "room": room,
                             "comment": comment,
+                            "school_term": validity_range.school_term,
                         },
                     )
                 )