chore(deps): bump rack-session from 2.1.1 to 2.1.2 (#14017)

Bumps [rack-session](https://github.com/rack/rack-session) from 2.1.1 to
2.1.2.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/rack/rack-session/blob/main/releases.md">rack-session's
changelog</a>.</em></p>
<blockquote>
<h2>v2.1.2</h2>
<ul>
<li><a
href="https://github.com/advisories/GHSA-33qg-7wpp-89cq">CVE-2026-39324</a>
Don't fall back to unencrypted coder if encryptors are present.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rack/rack-session/commit/504367b59caf7ec78127785cc6351f46be14f8ca"><code>504367b</code></a>
Bump patch version.</li>
<li><a
href="https://github.com/rack/rack-session/commit/f43638cb3a4d15c3ecaf59e67a04b47fda08eeac"><code>f43638c</code></a>
Don't fall back to unencrypted coder if encryptors are present.</li>
<li><a
href="https://github.com/rack/rack-session/commit/dadcfe60f193e8d8540bec6b95ca75bed8e5fd7e"><code>dadcfe6</code></a>
Bump actions/checkout from 4 to 5 (<a
href="https://redirect.github.com/rack/rack-session/issues/54">#54</a>)</li>
<li><a
href="https://github.com/rack/rack-session/commit/4eb9ea83b372e319c65a8c2bcfe87e8be942cf9b"><code>4eb9ea8</code></a>
Add top level session spec to validate existing formats.</li>
<li><a
href="https://github.com/rack/rack-session/commit/8f94577c1d11b746692974f1417acff2856060cb"><code>8f94577</code></a>
Add rails to external tests.</li>
<li><a
href="https://github.com/rack/rack-session/commit/38ea47da9937afb4f2140b3c23866e3791a46eaf"><code>38ea47d</code></a>
Allow the v2 encryptor to serialize messages with <code>Marshal</code>
(<a
href="https://redirect.github.com/rack/rack-session/issues/44">#44</a>)</li>
<li><a
href="https://github.com/rack/rack-session/commit/43f2e3a46393b51473bb90f54e61189465ae759d"><code>43f2e3a</code></a>
Fix compatibility with older Rubies.</li>
<li><a
href="https://github.com/rack/rack-session/commit/6a060b806399bff4961eaf6bf89535395c95549c"><code>6a060b8</code></a>
Support UTF-8 data when using the JSON serializer (<a
href="https://redirect.github.com/rack/rack-session/issues/39">#39</a>)</li>
<li><a
href="https://github.com/rack/rack-session/commit/8ce0146a7079332d9c58a43e418acb1ecf904ef6"><code>8ce0146</code></a>
Fix <code>auth_tag</code> retrieval on JRuby (<a
href="https://redirect.github.com/rack/rack-session/issues/32">#32</a>)</li>
<li><a
href="https://github.com/rack/rack-session/commit/77271850efd977897d02903bfde8ed51e4137a68"><code>7727185</code></a>
Add AEAD encryption (<a
href="https://redirect.github.com/rack/rack-session/issues/23">#23</a>)</li>
<li>See full diff in <a
href="https://github.com/rack/rack-session/compare/v2.1.1...v2.1.2">compare
view</a></li>
</ul>
</details>
<br />


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Gemfile.lock

@@ -699,7 +699,7 @@ GEM
       rack (>= 3.0.0, < 4)
     rack-proxy (0.7.7)
       rack
-    rack-session (2.1.1)
+    rack-session (2.1.2)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
     rack-test (2.1.0)