chore(deps-dev): bump mypy from 1.4.1 to 1.5.1 in /requirements

Bumps [mypy](https://github.com/python/mypy) from 1.4.1 to 1.5.1.
- [Commits](python/mypy@v1.4.1...v1.5.1)

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

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

requirements/dev.txt

@@ -7,7 +7,7 @@ pytest-cov==4.1.0
 # type checking and related stubs
 # mypy adds new rules in new minor versions, which could cause our PR check to fail
 # here we fix its version and upgrade it manually in the future
-mypy==1.4.1
+mypy==1.5.1
 types-pywin32==306.0.0.4
 types-PyYAML==6.0.12.11
 types-chevron==0.14.2.5