Bump alabaster from 0.7.12 to 1.0.0

Bumps [alabaster](https://github.com/sphinx-doc/alabaster) from 0.7.12 to 1.0.0.
- [Release notes](https://github.com/sphinx-doc/alabaster/releases)
- [Changelog](https://github.com/sphinx-doc/alabaster/blob/master/docs/changelog.rst)
- [Commits](sphinx-doc/alabaster@0.7.12...1.0.0)

---
updated-dependencies:
- dependency-name: alabaster
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

docs/requirements.txt

@@ -6,7 +6,7 @@ git+https://github.com/graphite-project/whisper.git#egg=whisper
 git+https://github.com/graphite-project/ceres.git#egg=ceres
 Django<5
 pyparsing>=3.0.6
-alabaster==0.7.12
+alabaster==1.0.0
 Sphinx==1.3.6
 jinja2<3.1.0
 sphinx_rtd_theme