chore(deps-dev): Bump mypy in /packages/jsii-pacmak/test/generated-code (#3665)

Bumps [mypy](https://github.com/python/mypy) from 0.961 to 0.971.
- [Release notes](https://github.com/python/mypy/releases)
- [Commits](python/mypy@v0.961...v0.971)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

packages/jsii-pacmak/test/generated-code/requirements-dev.txt

@@ -1 +1 @@
-mypy==0.961
+mypy==0.971