chore(deps): bump httpx from 0.28.0 to 0.28.1 (#5610)

Bumps [httpx](https://github.com/encode/httpx) from 0.28.0 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@0.28.0...0.28.1)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-base.txt

@@ -154,7 +154,7 @@ httplib2==0.22.0
     #   google-api-python-client
     #   google-auth-httplib2
     #   oauth2client
-httpx==0.28.0
+httpx==0.28.1
     # via
     #   -r requirements-base.in
     #   openai