Bump httpx from 0.27.2 to 0.28.0 (#1970)

Bumps [httpx](https://github.com/encode/httpx) from 0.27.2 to 0.28.0.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.27.2...0.28.0)

---
updated-dependencies:
- dependency-name: httpx
  dependency-type: direct:development
  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>

Author: dependabot[bot]

poetry.lock

@@ -57,7 +57,7 @@ mypy = {version = ">=1.12,<1.14", optional = true}
 anyio = "^4.3"
 trio = "^0.27"
 attrs = "^24.2"
-httpx = "^0.27"
+httpx = ">=0.27,<0.29"
 
 wemake-python-styleguide = "^0.19"
 flake8-pytest-style = "^2.0"