Update to Uvicorn 0.28.1

This commit will update/upgrade to Uvicorn 0.28.1.
[Changes](encode/uvicorn@0.25.0...0.28.1)
to Uvicorn between 0.25.0 and 0.28.1 include updates to `root_path`/
`--root-path` to comply with the ASGI spec, and fixes to `Keep-Alive`
behavior to avoid timeouts and `h11.LocalProtocolError` exceptions that
occur when processing pipelined requests.

pyproject.toml

@@ -23,7 +23,7 @@ classifiers = [
 ]
 dependencies = [
   "gunicorn==22.0.0",
-  "uvicorn==0.25.0",
+  "uvicorn==0.28.1",
 ]
 description = "Docker images and utilities to power your Python APIs and help you ship faster."
 dynamic = ["version"]
@@ -60,7 +60,7 @@ uvicorn-fast = [
   "websockets>=10.4",
 ]
 uvicorn-standard = [
-  "uvicorn[standard]==0.25.0",
+  "uvicorn[standard]==0.28.1",
 ]
 
 [project.urls]