build: bump urllib3 from 2.3.0 to 2.4.0 in /src

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.3.0 to 2.4.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.3.0...2.4.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/requirements-dev.txt

@@ -6,7 +6,7 @@ tqdm==4.67.1
 tiktoken
 langchain==0.3.23
 bs4==0.0.2
-urllib3==2.3.0
+urllib3==2.4.0
 pytest==8.3.5
 pytest-asyncio==0.26.0
 PyMuPDF==1.25.5