Bump httpx from 0.23.3 to 0.24.0

Bumps [httpx](https://github.com/encode/httpx) from 0.23.3 to 0.24.0.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.23.3...0.24.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -97,7 +97,7 @@ strict-rfc3339 = "^0.7"
 webob = "*"
 mypy = "^1.1"
 starlette = "^0.26.1"
-httpx = "^0.23.3"
+httpx = "^0.24.0"
 
 [tool.poetry.group.docs.dependencies]
 sphinx = "^5.3.0"