Bump alabaster from 0.7.15 to 0.7.16

Bumps [alabaster](https://github.com/sphinx-doc/alabaster) from 0.7.15 to 0.7.16.
- [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@0.7.15...0.7.16)

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

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -19,7 +19,7 @@
     ],
     "docs": [
         "sphinx==7.2.6",
-        "alabaster==0.7.15",
+        "alabaster==0.7.16",
         "sphinx-issues==3.0.1",
     ],
 }