Bump pydocstyle from 5.0.2 to 5.1.0

Bumps [pydocstyle](https://github.com/PyCQA/pydocstyle) from 5.0.2 to 5.1.0.
- [Release notes](https://github.com/PyCQA/pydocstyle/releases)
- [Changelog](https://github.com/PyCQA/pydocstyle/blob/master/docs/release_notes.rst)
- [Commits](PyCQA/pydocstyle@5.0.2...5.1.0)

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

requirements.txt

@@ -8,7 +8,7 @@ Flask-SeaSurf==0.2.2
 flask-talisman==0.7.0
 gunicorn==20.0.4
 pycodestyle==2.6.0
-pydocstyle==5.0.2
+pydocstyle==5.1.0
 requests==2.24.0
 Sphinx==3.2.1
 Werkzeug==1.0.1