Add a dummy url in the pom.

pom.xml

@@ -15,7 +15,7 @@
 
 	<name>TrackingPerformance</name>
 	<description>Compute tracking performance based on the ISBI SPT Grand Challenge metrics.</description>
-	<url></url>
+	<url>https://gitlab.pasteur.fr/iah-public</url>
 	<inceptionYear>2021</inceptionYear>
 	<organization>
 		<name>IAH / C2RT / Institut Pasteur</name>