Bump flake8-rst-docstrings from 0.2.5 to 0.3.0

Bumps [flake8-rst-docstrings](https://github.com/peterjc/flake8-rst-docstrings) from 0.2.5 to 0.3.0.
- [Commits](peterjc/flake8-rst-docstrings@v0.2.5...v0.3.0)

---
updated-dependencies:
- dependency-name: flake8-rst-docstrings
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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