Bump fastapi from 0.72.0 to 0.73.0 in /server

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.72.0 to 0.73.0.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.72.0...0.73.0)

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

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

server/requirements.txt

@@ -6,7 +6,7 @@ cffi==1.15.0
 click==8.0.3
 dnspython==2.2.0
 email-validator==1.1.3
-fastapi==0.72.0
+fastapi==0.73.0
 greenlet==1.1.2
 h11==0.13.0
 idna==3.3