Bump ruby/setup-ruby from 1.238.0 to 1.286.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.238.0 to 1.286.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@e34163c...90be115)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.286.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Check out code
       uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
     - name: Set up Ruby ${{ matrix.ruby }}
-      uses: ruby/setup-ruby@e34163cd15f4bb403dcd72d98e295997e6a55798 # v1.238.0
+      uses: ruby/setup-ruby@90be1154f987f4dc0fe0dd0feedac9e473aa4ba8 # v1.286.0
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true