Bump ruby/setup-ruby from 1.263.0 to 1.264.0
Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.263.0 to 1.264.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](https://github.com/ruby/setup-ruby/compare/
0481980f17b760ef6bca5e8c55809102a0af1e5a...
6797dcbb9a1889fd411d07e8aba7eded53fb8b48)
---
updated-dependencies:
- dependency-name: ruby/setup-ruby
dependency-version: 1.264.0
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>