Update mypy requirement from >=1.15 to >=2.3.0

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@v1.15.0...v2.3.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.3.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

dev_requirements.txt

@@ -21,4 +21,4 @@ pytest==9.1.1
 pytest-timeout==2.4.0
 pytest-rerunfailures==15.1
 pytest-cov>=6.0
-mypy>=1.15
+mypy>=2.3.0