Bump ruby/setup-ruby from 1.269.0 to 1.270.0 (#6381)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.269.0 to 1.270.0.
- [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/d697be2f83c6234b20877c3b5eac7a7f342f0d0c...ac793fdd38cc468a4dd57246fa9d0e868aba9085)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.270.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docs.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
-      - uses: ruby/setup-ruby@d697be2f83c6234b20877c3b5eac7a7f342f0d0c # v1.269.0
+      - uses: ruby/setup-ruby@ac793fdd38cc468a4dd57246fa9d0e868aba9085 # v1.270.0
         with:
           bundler-cache: true
       - name: Build SwiftLint and SourceKitten

.github/workflows/release.yml

@@ -76,7 +76,7 @@ jobs:
         with:
           persist-credentials: false
       - name: Set up Ruby and Bundler
-        uses: ruby/setup-ruby@d697be2f83c6234b20877c3b5eac7a7f342f0d0c # v1.269.0
+        uses: ruby/setup-ruby@ac793fdd38cc468a4dd57246fa9d0e868aba9085 # v1.270.0
         with:
           bundler-cache: true
       - name: Lint Podspec # Make sure Podspec still builds okay on CI with old release.