chore(deps): bump rack-protection from 4.2.0 to 4.2.1 (#1110)

Bumps [rack-protection](https://github.com/sinatra/sinatra) from 4.2.0
to 4.2.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/sinatra/sinatra/blob/main/CHANGELOG.md">rack-protection's
changelog</a>.</em></p>
<blockquote>
<h2>4.2.1 / 2025-10-10</h2>
<ul>
<li>Fix: Revert &quot;<code>PATH_INFO</code> can never be empty&quot;
(<a
href="https://redirect.github.com/sinatra/sinatra/pull/2124">#2124</a>)
<ul>
<li>addresses issues with routing and 404, <a
href="https://redirect.github.com/sinatra/sinatra/issues/2113#issuecomment-3388476329">more
in the original pull request</a></li>
</ul>
</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sinatra/sinatra/commit/599a007a779dc9940e49f34e9077220f4c209f4b"><code>599a007</code></a>
4.2.1 release (<a
href="https://redirect.github.com/sinatra/sinatra/issues/2125">#2125</a>)</li>
<li>See full diff in <a
href="https://github.com/sinatra/sinatra/compare/v4.2.0...v4.2.1">compare
view</a></li>
</ul>
</details>
<br />


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</details>

Author: rsmithlal

Gemfile.lock

@@ -541,7 +541,7 @@ GEM
       rack (>= 3.0.14)
     rack-mini-profiler (4.0.1)
       rack (>= 1.2.0)
-    rack-protection (4.2.0)
+    rack-protection (4.2.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)