Update utility.md

docs/utility.md

@@ -8,4 +8,4 @@ Large raster datasets often comes as a collection of regular tiles.
 In order to run the raster analysis offered in our tools, they often need to be merged into one file.
 To do that, a simple python script is provided as jupyter notebook.
 
-[Download it](../utility/merge_tiles/Merge_tiles.zip) on your computer and run it in the same python environment as the other CCDR tools.
+[Download it](../_static/merge_tiles.zip) on your computer and run it in the same python environment as the other CCDR tools.