Bump httpx from 0.23.1 to 0.23.3

Bumps [httpx](https://github.com/encode/httpx) from 0.23.1 to 0.23.3.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.23.1...0.23.3)

---
updated-dependencies:
- dependency-name: httpx
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -92,7 +92,7 @@ strict-rfc3339 = "^0.7"
 webob = "*"
 mypy = "^0.971"
 starlette = "^0.21.0"
-httpx = "^0.23.0"
+httpx = "^0.23.3"
 
 [tool.pytest.ini_options]
 addopts = """