build(deps): bump httpx from 0.27.2 to 0.28.1 (#10)

Bumps [httpx](https://github.com/encode/httpx) from 0.27.2 to 0.28.1.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.27.2...0.28.1)

---
updated-dependencies:
- dependency-name: httpx
  dependency-version: 0.28.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...
Co-authored-by: Chak Saray <chaksaray@gmail.com>

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
 fastapi==0.115.0
 uvicorn[standard]==0.32.0
-httpx==0.27.2
-slowapi==0.1.10
+httpx==0.28.1
+slowapi==0.1.9