Update LastModified date format to ISO string in XML response

Author: ZiyangLinScality

lib/routes/veeam/list.js

@@ -38,7 +38,7 @@ function buildXMLResponse(request, arrayOfFiles, versioned = false) {
         value: {
             IsDeleteMarker: false,
             IsNull: true,
-            LastModified: file['Last-Modified'],
+            LastModified: new Date(file['Last-Modified']).toISOString(),
             // Generated ETag alrady contains quotes, removing them here
             ETag: file.ETag.substring(1, file.ETag.length - 1),
             Size: file['Content-Length'],