package/bridge-utils: update project URL in Config.in help text

The old URL no longer works and shows "No repositories found".
Replace it with:
https://wiki.linuxfoundation.org/networking/bridge

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
(cherry picked from commit e8ad4f2d07462d8b022643c663e0fd7e9c7b5201)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bridge-utils/Config.in

@@ -8,4 +8,4 @@ config BR2_PACKAGE_BRIDGE_UTILS
 	  added. Instead use the bridge command from the iproute2
 	  package which supports more features.
 
-	  https://git.kernel.org/cgit/linux/kernel/git/shemminger/bridge-utils.git/
+	  https://wiki.linuxfoundation.org/networking/bridge