Fixed illustration

Former-commit-id: e0339242d6d63fd53659db6abd28254199484cf6

Author: vwvbrand

src/4_impedance.ipynb

@@ -13,7 +13,7 @@
     "\n",
     "It depends on user whether they use this tool to create the detailed representation of landscape impedance or apply the simplified schema.\n",
     "\n",
-    "![Pilot-2_2-impedance_ipynb.png](../visualisation/attachment:Pilot-2_4_impedance.png)\n",
+    "![Pilot-2_2-impedance_ipynb.png](../visualisation/Pilot-2_4_impedance.png)\n",
     "\n",
     "**INPUT (mandatory)**\n",
     "- Impedance raster dataset (GeoTIFF)\n",