package/w_scan: update the upstream URL in Config.in

Update the upstream URL in the help text in Config.in. This
addresses the 'Invalid(Err)' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
[yann.morin.1998@free.fr: use offical (de) homepage]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 2ca152fb7025a423a73cc45ebf53a3d102de0e28)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/w_scan/Config.in

@@ -11,4 +11,4 @@ config BR2_PACKAGE_W_SCAN
 	  capable of creating channels.conf files (in different output
 	  formats !) as well as initial tuning data for scan.
 
-	  http://wirbel.htpc-forum.de/w_scan/index_en.html
+	  https://www.gen2vdr.de/wirbel/w_scan/index2.html