Bump urllib3 from 2.0.4 to 2.0.6 in /requirements (#336)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.0.4 to 2.0.6.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.0.4...2.0.6)

---
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>

requirements/requirements-macOS-latest-3.9.txt

@@ -231,7 +231,7 @@ typing-extensions==4.7.1
     #   typer
 tzdata==2023.3
     # via pandas
-urllib3==2.0.4
+urllib3==2.0.6
     # via
     #   distributed
     #   requests

requirements/requirements-ubuntu-latest-3.9.txt

@@ -266,7 +266,7 @@ typing-extensions==4.7.1
     #   typer
 tzdata==2023.3
     # via pandas
-urllib3==2.0.4
+urllib3==2.0.6
     # via
     #   distributed
     #   requests

requirements/requirements-windows-latest-3.9.txt

@@ -235,7 +235,7 @@ typing-extensions==4.7.1
     #   typer
 tzdata==2023.3
     # via pandas
-urllib3==2.0.4
+urllib3==2.0.6
     # via
     #   distributed
     #   requests