Fix image paths in jupyter notebook

Author: sayalaruano

docs/vuegen_demo.ipynb

@@ -10,11 +10,11 @@
     "\n",
     "An overview of the VueGen workflow is shown in the figure below:\n",
     "\n",
-    "![Vuegen graphical abstarct](../docs/images/vuegen_graph_abstract.png)\n",
+    "![Vuegen graphical abstarct](./images/vuegen_graph_abstract.png)\n",
     "\n",
     "Also, the class diagram for the project is presented below to illustrate the architecture and relationships between classes:\n",
     "\n",
-    "![Vuegen class diagram](../docs/images/vuegen_classdiagram_noattmeth.png)\n"
+    "![Vuegen class diagram](./images/vuegen_classdiagram_noattmeth.png)\n"
    ]
   },
   {