chore(deps-dev): update mypy requirement in /packages/http/httpx

Updates the requirements on [mypy](https://github.com/python/mypy) to permit the latest version.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.11.2...v2.0.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.0.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

packages/http/httpx/pyproject.toml

@@ -35,7 +35,7 @@ httpx = {extras = ["http2"], version = ">=0.25,<1.0.0"}
 yapf = ">=0.40.2,<0.44.0"
 isort = ">=5.13.2,<9.0.0"
 pylint = ">=3.2.7,<5.0.0"
-mypy = "^1.11.2"
+mypy = ">=1.11.2,<3.0.0"
 pytest = ">=8.3.2,<10.0.0"
 pytest-asyncio = ">=0.24,<1.4"
 pytest-mock = "^3.14.0"