Update fastapi requirement from ~=0.96.0 to ~=0.96.1 in /code/function

Updates the requirements on [fastapi](https://github.com/tiangolo/fastapi) to permit the latest version.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.96.0...0.96.1)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

code/function/requirements.txt

@@ -3,5 +3,5 @@
 # Manually managing azure-functions-worker may cause unexpected issues
 
 azure-functions~=1.14.0
-fastapi~=0.96.0
+fastapi~=0.96.1
 aiohttp~=3.8.4