Bump httpx from 0.27.2 to 0.28.0

Bumps [httpx](https://github.com/encode/httpx) from 0.27.2 to 0.28.0.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.27.2...0.28.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -54,7 +54,7 @@ dev = [
   "hypothesis==6.119.3",
   "pytest-mock==3.14.0",
   "fastapi==0.115.5",
-  "httpx==0.27.2",
+  "httpx==0.28.0",
   "mpi4py==4.0.1",
   "kaleido==0.4.1",
   "pytest-random-order==1.1.1",