GoDaddy Managed WordPress is really managed and one of the ways GoDaddy manages your WordPress is to update your WordPress core to the latest version. If you have your own WordPress installation outside of Managed WordPress you can keep it to whatever old version you would like*.
The updating to the latest version of WordPress is a feature not a bug. If you don't want to be automatically updated you should move to a different level of GoDaddy hosting plan. I hope that helps?
*Note that WordPress often automatically pushes patches to do with security issues to older versions of WordPress.
...turns out that my two cents is worth less or more depending on the current exchange rate.
roy darling *my posts seem a lot shorter in my head