chore: Fix ruff errors

graphs/edmonds_karp_multiple_source_and_sink.py

@@ -113,7 +113,7 @@ def _algorithm(self):
         vertices_list = [
             i
             for i in range(self.verticies_count)
-            if i != self.source_index and i != self.sink_index
+            if i not in (self.source_index, self.sink_index)
         ]
 
         # move through list