Bump ruby/setup-ruby from 1.203.0 to 1.204.0 (#538)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.203.0
to 1.204.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ruby/setup-ruby/releases">ruby/setup-ruby's
releases</a>.</em></p>
<blockquote>
<h2>v1.204.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Add ruby-3.4.0-rc1 by <a
href="https://github.com/ruby-builder-bot"><code>@​ruby-builder-bot</code></a>
in <a
href="https://redirect.github.com/ruby/setup-ruby/pull/675">ruby/setup-ruby#675</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/ruby/setup-ruby/compare/v1.203.0...v1.204.0">https://github.com/ruby/setup-ruby/compare/v1.203.0...v1.204.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ruby/setup-ruby/commit/401c19e14f474b54450cd3905bb8b86e2c8509cf"><code>401c19e</code></a>
Add ruby-3.4.0-rc1</li>
<li>See full diff in <a
href="https://github.com/ruby/setup-ruby/compare/2a18b06812b0e15bb916e1df298d3e740422c47e...401c19e14f474b54450cd3905bb8b86e2c8509cf">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby ${{ matrix.ruby }}
-      uses: ruby/setup-ruby@2a18b06812b0e15bb916e1df298d3e740422c47e #v1.190.0 tag
+      uses: ruby/setup-ruby@401c19e14f474b54450cd3905bb8b86e2c8509cf #v1.190.0 tag
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true