Update uvicorn[standard] requirement in /package (#1188)

Updates the requirements on [uvicorn[standard]](https://github.com/encode/uvicorn) to permit the latest version.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.19.0...0.20.0)

---
updated-dependencies:
- dependency-name: uvicorn[standard]
  dependency-type: direct:production
...

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package/requirements.txt

@@ -3,7 +3,7 @@ kedro>=0.17.0
 ipython>=7.0.0, <9.0
 fastapi>=0.73.0, <0.86.0
 aiofiles==22.1.0
-uvicorn[standard]~=0.19.0
+uvicorn[standard]~=0.20.0
 watchgod~=0.8.2
 plotly>=4.0
 pandas>=0.24