chore(deps): bump httpx from 0.27.2 to 0.28.1

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-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -12,7 +12,7 @@ repository = "https://github.com/emergentmethods/asknews-python-sdk"
 python = ">=3.8.1,<4.0"
 orjson = "^3.9.10"
 pydantic = {extras = ["email"], version = "^2.10.4"}
-httpx = "^0.27.2"
+httpx = ">=0.27.2,<0.29.0"
 asgiref = "^3.7.2"
 cryptography = ">=40.0.0,<43.0.4"
 crontab = "^1.0.1"