Bump pylint from 3.3.8 to 3.3.9 in /server (#731)

Bumps [pylint](https://github.com/pylint-dev/pylint) from 3.3.8 to 3.3.9.
- [Release notes](https://github.com/pylint-dev/pylint/releases)
- [Commits](pylint-dev/pylint@v3.3.8...v3.3.9)

---
updated-dependencies:
- dependency-name: pylint
  dependency-version: 3.3.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

server/test_requirements.txt

@@ -1,5 +1,5 @@
 pytest<8.5
 pytest-asyncio
-pylint==3.3.8
+pylint==3.3.9
 black==25.11.0
 isort==5.13.2