chore(deps): update fastapi requirement from ~=0.103.2 to ~=0.104.0

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@0.103.2...0.104.0)

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

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

app/requirements.txt

@@ -1,7 +1,7 @@
 aiosmtplib~=2.0.2
 asyncpg~=0.28.0
 cryptography~=41.0.4
-fastapi~=0.103.2
+fastapi~=0.104.0
 httpx~=0.25.0
 jinja2~=3.1.2
 jwcrypto~=1.5.0