Bump filelock from 3.19.1 to 3.20.1

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.19.1 to 3.20.1.
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/py-filelock/compare/3.19.1...3.20.1)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 3.20.1
  dependency-type: direct:production
...

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

requirements.txt

@@ -21,7 +21,7 @@ darkdetect==0.8.0
 dataclasses-json==0.6.7
 distro==1.9.0
 durationpy==0.10
-filelock==3.19.1
+filelock==3.20.1
 flatbuffers==25.2.10
 frozenlist==1.7.0
 fsspec==2025.9.0