Bump uvicorn[standard] from 0.20.0 to 0.28.0

Bumps [uvicorn[standard]](https://github.com/encode/uvicorn) from 0.20.0 to 0.28.0.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.20.0...0.28.0)

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

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

requirements.txt

@@ -35,4 +35,4 @@ rules==3.3
 sentry-sdk==1.40.5
 slackclient==2.9.4
 urllib3==1.26.18
-uvicorn[standard]==0.20.0
+uvicorn[standard]==0.28.0