Bump uvicorn[standard] from 0.30.6 to 0.31.1 in /server

Bumps [uvicorn[standard]](https://github.com/encode/uvicorn) from 0.30.6 to 0.31.1.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.30.6...0.31.1)

---
updated-dependencies:
- dependency-name: uvicorn[standard]
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

server/requirements.txt

@@ -36,7 +36,7 @@ websockets==13.*
 # deploy
 psycopg2==2.9.9
 gunicorn==23.0.0
-uvicorn[standard]==0.30.6
+uvicorn[standard]==0.31.1
 
 # dev
 daphne==4.1.*