build(deps): bump urllib3 from 2.6.0 to 2.6.3

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.6.0 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@2.6.0...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -94,7 +94,7 @@ transaction==3.1.0
     # via zodb
 url-normalize==1.4.3
     # via requests-cache
-urllib3==2.6.0
+urllib3==2.6.3
     # via
     #   requests
     #   requests-cache

requirements_dev.txt

@@ -143,7 +143,7 @@ url-normalize==1.4.3
     # via
     #   -r requirements.txt
     #   requests-cache
-urllib3==2.6.0
+urllib3==2.6.3
     # via
     #   -r requirements.txt
     #   requests