roman datamodels 0.17.1

What's Changed

• [pre-commit.ci] pre-commit autoupdate by @pre-commit-ci in #254
• pin sphinx_rtd_theme to newer version by @zacharyburnett in #255
• Fix maker utils to use correct units by @WilliamJamieson in #256

Full Changelog: 0.17.0...0.17.1