Bump urllib3 from 2.5.0 to 2.6.0

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -47,5 +47,5 @@ stix2==3.0.1
 stix2-patterns==2.0.0
 tabulate==0.9.0
 traitlets==5.14.1
-urllib3==2.5.0
+urllib3==2.6.0
 wcwidth==0.2.13

requirements.txt

@@ -124,7 +124,7 @@ traitlets==5.14.2
 twine==5.0.0
 types-python-dateutil==2.9.0.20240316
 uri-template==1.3.0
-urllib3==2.5.0
+urllib3==2.6.0
 wcwidth==0.2.13
 webcolors==1.13
 webencodings==0.5.1