GoUsers: fix the position of CloudSign

[CloudSign](https://www.cloudsign.jp/) is a product of [Bengo4.com,Inc.](https://corporate.bengo4.com/), so it should be indented under Bengo4.com,Inc.
This can be confirmed from the fact that there is a description of `© 2015 Bengo4.com,Inc.` at the very bottom of [the CloudSign website](https://www.cloudsign.jp/).

Change-Id: I8e18fe22087c3c3a41fbafe1fc8a855ada603fef
Reviewed-on: https://go-review.googlesource.com/c/wiki/+/703736
Reviewed-by: Sean Liao <sean@liao.dev>