⬆️ Update mypy requirement from >=0.991,<1.9 to >=0.991,<1.16

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@v0.991...v1.15.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -39,7 +39,7 @@ aiohttp = {version = "^3.11.11", optional = true}
 bandit = "^1.8.2"
 black = {version = ">=23.3,<25.0", allow-prereleases = true}
 isort = "^5.13.2"
-mypy = ">=0.991,<1.9"
+mypy = ">=0.991,<1.16"
 mypy-extensions = ">=0.4.3,<1.1.0"
 pre-commit = "^3.8.0"
 pydocstyle = "^6.3.0"