Bump rack from 3.1.8 to 3.1.9 (#4292)

Bumps [rack](https://github.com/rack/rack) from 3.1.8 to 3.1.9.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rack/rack/blob/main/CHANGELOG.md">rack's
changelog</a>.</em></p>
<blockquote>
<h2>[3.1.9] - 2025-01-31</h2>
<h3>Fixed</h3>
<ul>
<li><code>Rack::MediaType#params</code> now handles parameters without
values. (<a
href="https://redirect.github.com/rack/rack/pull/2263">#2263</a>, <a
href="https://github.com/AllyMarthaJ"><code>@​AllyMarthaJ</code></a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rack/rack/commit/e217a399eb116362710aac7c5b8dc691ea2189b3"><code>e217a39</code></a>
Bump patch version.</li>
<li><a
href="https://github.com/rack/rack/commit/3383cf2ffac501d8ca6d75f2ef789ac75c84dc13"><code>3383cf2</code></a>
Update changelog.</li>
<li><a
href="https://github.com/rack/rack/commit/edb0869eec776a240e9a10689190e9ebe6e87071"><code>edb0869</code></a>
fix: malformed charset param (<a
href="https://redirect.github.com/rack/rack/issues/2263">#2263</a>) (<a
href="https://redirect.github.com/rack/rack/issues/2277">#2277</a>)</li>
<li><a
href="https://github.com/rack/rack/commit/09de82f615da103c7251b9879aac61964b9e1947"><code>09de82f</code></a>
Update test versions.</li>
<li><a
href="https://github.com/rack/rack/commit/890db461cc1fff1f841ed99f3188c7ce6a583757"><code>890db46</code></a>
Fix permissions for external tests. (<a
href="https://redirect.github.com/rack/rack/issues/2244">#2244</a>)</li>
<li><a
href="https://github.com/rack/rack/commit/b2aebc732f74e0487102d42902d35c3d2e736d56"><code>b2aebc7</code></a>
Fix title level.</li>
<li><a
href="https://github.com/rack/rack/commit/b441049ec4a0aa5748bf89ded14263976cea6c7f"><code>b441049</code></a>
Add <code>Fixed</code> section.</li>
<li>See full diff in <a
href="https://github.com/rack/rack/compare/v3.1.8...v3.1.9">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=rack&package-manager=bundler&previous-version=3.1.8&new-version=3.1.9)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

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

Author: dependabot[bot]

Gemfile.lock

@@ -311,7 +311,7 @@ GEM
     puma (6.6.0)
       nio4r (~> 2.0)
     racc (1.8.1)
-    rack (3.1.8)
+    rack (3.1.9)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)
     rack-contrib (2.5.0)