Merge pull request python-openapi#969 from python-openapi/dependabot/pip/httpx-0.28.1

Bump httpx from 0.27.2 to 0.28.1

Author: p1c2u

poetry.lock

@@ -106,7 +106,7 @@ starlette = ">=0.26.1,<0.45.0"
 strict-rfc3339 = "^0.7"
 webob = "*"
 mypy = "^1.2"
-httpx = ">=0.24,<0.28"
+httpx = ">=0.24,<0.29"
 deptry = ">=0.11,<0.21"
 aiohttp = "^3.8.4"
 pytest-aiohttp = "^1.0.4"