Bump ruby/setup-ruby from 1.203.0 to 1.204.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.203.0 to 1.204.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@2a18b06...401c19e)

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

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

.github/workflows/docs.yml

@@ -38,7 +38,7 @@ jobs:
     - name: Git Checkout
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
     - name: Set up Ruby
-      uses: ruby/setup-ruby@2a18b06812b0e15bb916e1df298d3e740422c47e
+      uses: ruby/setup-ruby@401c19e14f474b54450cd3905bb8b86e2c8509cf
       with:
         ruby-version: 2.7
         bundler-cache: true

.github/workflows/postrelease.yml

@@ -41,7 +41,7 @@ jobs:
       with:
         ref: next
     - name: Set up Ruby
-      uses: ruby/setup-ruby@2a18b06812b0e15bb916e1df298d3e740422c47e
+      uses: ruby/setup-ruby@401c19e14f474b54450cd3905bb8b86e2c8509cf
       with:
         ruby-version: 2.7
         bundler-cache: true