⬆ Bump httpx from 0.24.1 to 0.28.1 (#1238)

Bumps [httpx](https://github.com/encode/httpx) from 0.24.1 to 0.28.1.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](https://github.com/encode/httpx/compare/0.24.1...0.28.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-github-actions.txt

@@ -1,5 +1,5 @@
 PyGithub>=2.3.0,<3.0.0
 pydantic>=2.5.3,<3.0.0
 pydantic-settings>=2.1.0,<3.0.0
-httpx>=0.27.0,<0.28.0
+httpx>=0.27.0,<0.29.0
 smokeshow

requirements-tests.txt

@@ -6,7 +6,7 @@ mypy ==1.4.1
 ruff ==0.9.6
 # For FastAPI tests
 fastapi >=0.103.2
-httpx ==0.24.1
+httpx ==0.28.1
 dirty-equals ==0.9.0
 jinja2 ==3.1.6
 typing-extensions ==4.12.2