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

Update the upstream URL in the help text in Config.in. This
addresses the 'Invalid(404)' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ifenslave/Config.in

@@ -4,4 +4,4 @@ config BR2_PACKAGE_IFENSLAVE
 	help
 	  Configure network interfaces for parallel routing (bonding)
 
-	  http://anonscm.debian.org/cgit/collab-maint/ifenslave.git
+	  https://salsa.debian.org/debian/ifenslave