docs: clarify the format of solutions

program/serializers.py

@@ -1095,7 +1095,8 @@ class ScheduleCreateUpdateRequestSerializer(serializers.Serializer):
     solutions = serializers.DictField(
         child=serializers.ChoiceField(SOLUTION_CHOICES),
         required=False,
-        help_text="Array of solution choices.",
+        help_text="Dictionary of solution choices. The key is the collision’s `hash` , the value "
+        "is one of the `solutionChoices` offered.",
     )