deps(deps): bump httpx from 0.26.0 to 0.28.1

Bumps [httpx](https://github.com/encode/httpx) from 0.26.0 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/0.26.0...0.28.1)

---
updated-dependencies:
- dependency-name: httpx
  dependency-version: 0.28.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -108,7 +108,7 @@ license = "MIT"
 requires-python = ">=3.13"
 dependencies = [
     "click==8.1.7",
-    "httpx==0.26.0",
+    "httpx==0.28.1",
     "pydantic==2.5.3",
     "pyyaml==6.0.3",
     "rich==13.7.0",