logs: log regUrl for mismatched npm lookup

lib/datasource/npm.js

@@ -149,7 +149,7 @@ async function getDependencyInner(name, retries = 5) {
     })).body;
     if (res.name !== name) {
       logger.warn(
-        { lookupName: name, returnedName: res.name },
+        { lookupName: name, returnedName: res.name, regUrl },
         'Returned name does not match with requested name'
       );
       return null;