Fix image url

README.md

@@ -152,7 +152,7 @@ parse_trajectories:
 <br>
     Result:
 
-    <img alt="graph trajectory" src="./graphs/graph_example_with_legend.png" />
+    <img alt="graph trajectory" src="https://gitlab.irisa.fr/0000B8EG/Cadbiom/blob/code_review/graphs/graph_example_with_legend.png" />
 
 
 # License