Bump filelock from 3.13.1 to 3.20.0 in /install

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.13.1 to 3.20.0.
- [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@3.13.1...3.20.0)

---
updated-dependencies:
- dependency-name: filelock
  dependency-version: 3.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

install/requirements.txt

@@ -4,7 +4,7 @@ argparse==1.4.0
 bcrypt==4.1.2
 distro==1.9.0
 email_validator==2.3.0
-filelock==3.13.1
+filelock==3.20.0
 Flask==3.1.2
 Flask_Accept==0.0.6
 Flask_Babel==4.0.0