build(deps): bump urllib3 in /tests/opentelemetry-docker-tests/tests (#4091)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.19 to 2.6.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.19...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>

Author: 2 people

tests/opentelemetry-docker-tests/tests/test-requirements.txt

@@ -54,7 +54,7 @@ SQLAlchemy==1.4.52
 tomli==2.0.1
 typing_extensions==4.12.2
 tzdata==2024.1
-urllib3==1.26.19
+urllib3==2.6.3
 vine==5.1.0
 wcwidth==0.2.13
 wrapt==1.16.0