Add version 1.16.2 to .tool-versions file and update Ruby dependencies

What does this Merge Request do and why?

Adds the latest point release of the first minor release to support Apple Silicon natively, but doesn't yet default to it.

Also includes some dependency updates. I originally included them to try and fix broken pipelines, but the problems were upstream and went away. I thought I'd leave them in.

Merge Request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise Issue to follow-up.
• Documentation added/updated, if needed.
• gdk doctor test added, if needed.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.