build(deps): bump alabaster from 0.7.12 to 0.7.13 in /docs (#2526)

Bumps [alabaster](https://github.com/bitprophet/alabaster) from 0.7.12 to 0.7.13.
- [Changelog](https://github.com/sphinx-doc/alabaster/blob/0.x/docs/changelog.rst)
- [Commits](sphinx-doc/alabaster@0.7.12...0.7.13)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
-alabaster==0.7.12
+alabaster==0.7.13
 Babel==2.9.1
 certifi==2023.7.22
 chardet==5.1.0