build(deps-dev): bump fastapi in /templates/llama2-functions

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.104.1 to 0.109.1.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.104.1...0.109.1)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-type: indirect
...

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