Bump the dev-dependencies group across 1 directory with 2 updates

Bumps the dev-dependencies group with 2 updates in the /proxy directory: [pytest](https://github.com/pytest-dev/pytest) and [pytest-httpbin](https://github.com/kevin1024/pytest-httpbin).


Updates `pytest` from 8.3.1 to 8.3.3
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.1...8.3.3)

Updates `pytest-httpbin` from 2.0.0 to 2.1.0
- [Release notes](https://github.com/kevin1024/pytest-httpbin/releases)
- [Changelog](https://github.com/kevin1024/pytest-httpbin/blob/master/release.py)
- [Commits](kevin1024/pytest-httpbin@v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: pytest-httpbin
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

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

proxy/pyproject.toml

@@ -10,5 +10,5 @@ readme = "README.md"
 python = "^3.11"
 
 [tool.poetry.group.dev.dependencies]
-pytest = "^8.3.1"
-pytest-httpbin = "^2.0.0"
+pytest = "^8.3.3"
+pytest-httpbin = "^2.1.0"