Bump urllib3 from 1.25.8 to 1.26.5 in /examples/research_projects/lxmert (#11983)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.8 to 1.26.5.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.25.8...1.26.5

)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
...
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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/research_projects/lxmert/requirements.txt

@@ -90,7 +90,7 @@ tornado==6.0.4
 tqdm==4.48.2
 traitlets
 git+https://github.com/huggingface/transformers.git
-urllib3==1.25.8
+urllib3==1.26.5
 wcwidth==0.2.5
 webencodings==0.5.1
 wget==3.2