Bump filelock in /samples/crew-django-redis-postgres/app

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.18.0 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](tox-dev/filelock@3.18.0...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>

Author: dependabot[bot]

samples/crew-django-redis-postgres/app/requirements.txt

@@ -44,7 +44,7 @@ durationpy==0.10
 et_xmlfile==2.0.0
 executing==2.2.0
 fastapi==0.115.9
-filelock==3.18.0
+filelock==3.20.1
 flatbuffers==25.2.10
 frozenlist==1.6.0
 fsspec==2025.5.0