fix: fixed example

Author: jlerat

examples/gis_delineate_catchment.py

@@ -32,7 +32,7 @@
 source_file = Path(__file__).resolve()
 froot  = source_file.parent
 
-fgrid = froot.parent / "hydrodiy" / "gis" / "tests" / "fdtest.bil"
+fgrid = froot.parent / "src" / "hydrodiy" / "gis" / "tests" / "fdtest.bil"
 
 fimg = froot / "images" / "catchments"
 fimg.mkdir(exist_ok=True, parents=True)