Merge pull request #65 from DHTMLX/next

[fix] link in the what's new for v9.1.5

Author: mafanya23

docs/whatsnew.md

@@ -14,7 +14,7 @@ Released on June 5, 2025
 
 ### Fixes
 
-- DataCollection/TreeCollection. Fixed the [`sort()`](data_collection/api/datacollection_sort_method/) method in the `smartSorting` mode when sorting by more than three parameters
+- DataCollection/TreeCollection. Fixed the [`sort()`](data_collection/api/datacollection_sort_method.md) method in the `smartSorting` mode when sorting by more than three parameters
 - Grid. The `multiselect/select` editor passes the id instead of the value, while exporting data to an .xslx file
 - Grid. Sorting by the third column disregards the prior two-column sort order