[Docu] One of the dublicated word 'given' deleted.

web/content/docs/tools/meshing/vtu2grid/index.pandoc

@@ -10,7 +10,7 @@ author = "Karsten Rink"
 
 ## Introduction
 
-This utility rasterises an existing 3D mesh at a given given resolution. The result is a (quasi-)structured grid (consisting of hexahedral elements) with the same extent as the input mesh. Cell properties are mapped onto the grid (sampled at centre-points of each cube), while node properties are ignored. For large raster sizes,  an undersampling of the original mesh is possible.
+This utility rasterises an existing 3D mesh at a given resolution. The result is a (quasi-)structured grid (consisting of hexahedral elements) with the same extent as the input mesh. Cell properties are mapped onto the grid (sampled at centre-points of each cube), while node properties are ignored. For large raster sizes,  an undersampling of the original mesh is possible.
 
 The tool is part of the official [OpenGeoSys git repository](https://github.com/ufz/ogs).