Bump sphinx-tabs from 3.4.4 to 3.4.5

Bumps [sphinx-tabs](https://github.com/executablebooks/sphinx-tabs) from 3.4.4 to 3.4.5.
- [Release notes](https://github.com/executablebooks/sphinx-tabs/releases)
- [Changelog](https://github.com/executablebooks/sphinx-tabs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/executablebooks/sphinx-tabs/compare/v3.4.4...v3.4.5)