Update dependencies

vendor/github.com/mdlayher/netlink/nltest/errors_unix.go

@@ -0,0 +1,11 @@
+//go:build !plan9 && !windows
+// +build !plan9,!windows
+
+package nltest
+
+import "golang.org/x/sys/unix"
+
+func isSyscallError(err error) bool {
+	_, ok := err.(unix.Errno)
+	return ok
+}