Update sphinx-rtd-theme requirement from ~=1.2.0 to ~=2.0.0 in /fdmlpy (

#29)

Updates the requirements on [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) to permit the latest version.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@1.2.0...2.0.0)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

fdmlpy/requirements.txt

@@ -1,3 +1,3 @@
 build~=0.10.0
 sphinx~=6.2.1
-sphinx_rtd_theme~=1.2.0
+sphinx_rtd_theme~=2.0.0