The basic answer it yes. Because ultimately, it is your website.
However, if you have chosen for us to host your website, then this includes free updates from us. With our hosting plan, we include backups, security and management of your website. If you choose only for us to make your website where you host it yourself or with another hosting company, then we are not responsible for any breakages or security problems which you may encounter.
We highly recommend that you let us update the website for you, that way, you can be sure there will be no breakages on the website.
If you really want to update the website yourself, then we can make customized tutorials specific to your website explaining how to do it.