Bump faker from 15.2.0 to 15.3.1 in /server

Bumps [faker](https://github.com/joke2k/faker) from 15.2.0 to 15.3.1.
- [Release notes](https://github.com/joke2k/faker/releases)
- [Changelog](https://github.com/joke2k/faker/blob/master/CHANGELOG.md)
- [Commits](joke2k/faker@v15.2.0...v15.3.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

server/requirements-test.txt

@@ -9,7 +9,7 @@ pytest-xdist==3.0.2
 pytest-timeout==2.1.0
 pytest-sentry==0.1.9
 filelock==3.8.0
-faker==15.2.0
+faker==15.3.1
 freezegun==1.2.2
 nest_asyncio==1.5.6
 codecov==2.1.12