Bump Go to 1.17.9 for asdf users

What does this MR do?

Closes #729 (closed)

Support for Go 1.17 (and 1.18) is already in place (see #729 (comment 908683770)), this is needed to be consistent with other projects and for people using the GDK

TODO

• I added the Changelog trailer (e.g. Changelog: added) to the commits that need to be included in the changelog
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines