Bump fastapi in /apigw-websocket-api-fargate-cdk/src/api

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.100.0 to 0.109.1.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.100.0...0.109.1)

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

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

apigw-websocket-api-fargate-cdk/src/api/requirements.txt

@@ -1,4 +1,4 @@
-fastapi==0.100.0
+fastapi==0.109.1
 requests==2.31.0
 pydantic==2.1.1
 pyhumps==3.8.0