Bump `ruby/setup-ruby` to version `1.198.0`

[dependabot[bot]]

Bumps ruby/setup-ruby from 1.197.0 to 1.198.0.

Release notes

Sourced from ruby/setup-ruby's releases.

v1.198.0

What's Changed

• Add ruby-3.2.6 by @​ruby-builder-bot in ruby/setup-ruby#663

Full Changelog: https://github.com/ruby/setup-ruby/compare/v1.197.0...v1.198.0

Commits

• 98aefb3 Add ruby-3.2.6
• See full diff in compare view

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[violetagg]

This is superseded by #3491