all: update golang.zx2c4.com/wireguard to github.com/tailscale/wireguard-go (#6692)

This is temporary while we work to upstream performance work in
https://github.com/WireGuard/wireguard-go/pull/64. A replace directive
is less ideal as it breaks dependent code without duplication of the
directive.

Signed-off-by: Jordan Whited <jordan@tailscale.com>

tsnet/example/tsnet-http-client/tsnet-http-client.go

@@ -26,7 +26,7 @@ func main() {
 		flag.Usage()
 	}
 	tailnetURL := flag.Arg(0)
-	
+
 	s := new(tsnet.Server)
 	defer s.Close()