Bump h11 from 0.14.0 to 0.16.0 in /back-end

Bumps [h11](https://github.com/python-hyper/h11) from 0.14.0 to 0.16.0.
- [Commits](python-hyper/h11@v0.14.0...v0.16.0)

---
updated-dependencies:
- dependency-name: h11
  dependency-version: 0.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

back-end/requirements.txt

@@ -4,7 +4,7 @@ click==8.1.8
 contextlib2==21.6.0
 contextvars==2.4
 fastapi==0.115.12
-h11==0.14.0
+h11==0.16.0
 idna==3.10
 immutables==0.21
 importlib-metadata==8.6.1