[PIP] Update mypy requirement from ~=1.19.1 to ~=1.20.0

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@v1.19.1...v1.20.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.20.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

lint_requirements.txt

@@ -1,6 +1,6 @@
 # Lint requirements
 ruff~=0.15.1
-mypy~=1.19.1
+mypy~=1.20.0
 shellcheck-py~=0.11.0.1
 
 # Type annotation stubs