Bump anytree from 2.8.0 to 2.9.2 in /server

Bumps [anytree](https://github.com/c0fec0de/anytree) from 2.8.0 to 2.9.2.
- [Release notes](https://github.com/c0fec0de/anytree/releases)
- [Commits](c0fec0de/anytree@2.8.0...2.9.2)

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

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

server/requirements.txt

@@ -6,4 +6,4 @@ pylint-ignore==2022.1025
 marshmallow-sqlalchemy==0.29.0
 tornado-prometheus==0.1.2
 bcrypt==4.0.1
-anytree==2.8.0
+anytree==2.9.2