Bump uvicorn from 0.26.0 to 0.27.0.post1 in /api

Bumps [uvicorn](https://github.com/encode/uvicorn) from 0.26.0 to 0.27.0.post1.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.26.0...0.27.0.post1)

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

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

api/requirements.txt

@@ -30,7 +30,7 @@ sniffio==1.3.0
 starlette==0.35.1
 typing_extensions==4.9.0
 ujson==5.9.0
-uvicorn==0.26.0
+uvicorn==0.27.0.post1
 uvloop==0.19.0
 watchfiles==0.21.0
 websockets==12.0