Bump ruby/setup-ruby from 1.237.0 to 1.238.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.237.0 to 1.238.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@eaecf78...e34163c)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.238.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/pages-gem.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        uses: ruby/setup-ruby@eaecf785f6a34567a6d97f686bbb7bccc1ac1e5c # v1.237.0
+        uses: ruby/setup-ruby@e34163cd15f4bb403dcd72d98e295997e6a55798 # v1.238.0
         with:
           ruby-version: '3.3'
       - name: Build gem