Avoid deprecated abstractproperty

Author: FlorentinD

graphdatascience/procedure_surface/api/similarity/knn_endpoints.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from abc import ABC, abstractmethod, abstractproperty
+from abc import ABC, abstractmethod
 from typing import Any
 
 from pandas import DataFrame
@@ -16,7 +16,8 @@
 
 
 class KnnEndpoints(ABC):
-    @abstractproperty
+    @property
+    @abstractmethod
     def filtered(self) -> KnnFilteredEndpoints:
         pass