chore: update pylint requirement

Updates the requirements on [pylint](https://github.com/pylint-dev/pylint) to permit the latest version.

Updates `pylint` to 4.0.9
- [Release notes](https://github.com/pylint-dev/pylint/releases)
- [Commits](pylint-dev/pylint@v4.0.7...v4.0.9)

---
updated-dependencies:
- dependency-name: pylint
  dependency-version: 4.0.9
  dependency-type: direct:production
  dependency-group: pip
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
 jinja2~=3.1.6
-pylint~=4.0.7
+pylint~=4.0.9
 black~=26.5.1
 mkdocs~=1.6.1