Bump langchain-tests from 1.1.1 to 1.1.4 in /libs/langchain-mongodb (#325)

Bumps [langchain-tests](https://github.com/langchain-ai/langchain) from
1.1.1 to 1.1.4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/langchain-ai/langchain/releases">langchain-tests's
releases</a>.</em></p>
<blockquote>
<h2>langchain-tests==1.1.2</h2>
<p>Changes since langchain-tests==1.1.1</p>
<p>release(standard-tests): 1.1.2 (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/34507">#34507</a>)
style(text-splitters,standard-tests,cli): add ruff TC and RUF012 rules
(<a
href="https://redirect.github.com/langchain-ai/langchain/issues/34495">#34495</a>)
style: add ruff ISC001 rule (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/34493">#34493</a>)
fix(core): serialization patch (<a
href="https://redirect.github.com/langchain-ai/langchain/issues/34455">#34455</a>)</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li>See full diff in <a
href="https://github.com/langchain-ai/langchain/compare/langchain-tests==1.1.1...langchain-openai==1.1.4">compare
view</a></li>
</ul>
</details>
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