Update project URL in POM (#644)

Co-authored-by: Patrick Gotthard <patrick@patrick-gotthard.de>

Author: makigumo

pom.xml

@@ -20,7 +20,7 @@
 
     <description>Parent for all ROME projects</description>
 
-    <url>http://rometools.com</url>
+    <url>https://github.com/rometools/rome</url>
 
     <licenses>
         <license>