Build(deps): Bump mypy from 0.761 to 0.770

Bumps [mypy](https://github.com/python/mypy) from 0.761 to 0.770.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.761...v0.770)

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

requirements/ci.txt

@@ -1,5 +1,5 @@
 setuptools-git==1.2
-mypy==0.761; implementation_name=="cpython"
+mypy==0.770; implementation_name=="cpython"
 mypy-extensions==0.4.3; implementation_name=="cpython"
 
 -r ci-wheel.txt