Update mypy requirement from ~=1.11.0 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...v1.12.1)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,7 +1,7 @@
 black~=24.4.2
 pylint
 pip-tools
-mypy ~= 1.11.0
+mypy ~= 1.12.1
 pyre-check == 0.9.19
 pyright ~= 1.1.374
 pytype ~= 2023.12.18