Update mypy requirement from ~=1.11.2 to ~=1.12.1

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...v1.12.1)

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

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

requirements-dev.txt

@@ -2,6 +2,6 @@ pexpect~=4.9.0
 
 pylint~=3.2.7
 pylint-secure-coding-standard~=1.5.1
-mypy~=1.11.2
+mypy~=1.12.1
 types-pexpect
 ruff~=0.7.0