docs: networking: Fix bridge documentation URL

Current documentation URL [1] is no longer valid.

[1] https://www.linuxfoundation.org/collaborate/workgroups/networking/bridgeSigned-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://lore.kernel.org/r/20230124145127.189221-1-ivecera@redhat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/networking/bridge.rst

@@ -8,7 +8,7 @@ In order to use the Ethernet bridging functionality, you'll need the
 userspace tools.
 
 Documentation for Linux bridging is on:
-   http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge
+   https://wiki.linuxfoundation.org/networking/bridge
 
 The bridge-utilities are maintained at:
    git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/bridge-utils.git