Bump sphinx-book-theme from 1.1.3 to 1.1.4

Bumps [sphinx-book-theme](https://github.com/executablebooks/sphinx-book-theme) from 1.1.3 to 1.1.4.
- [Release notes](https://github.com/executablebooks/sphinx-book-theme/releases)
- [Changelog](https://github.com/executablebooks/sphinx-book-theme/blob/master/CHANGELOG.md)
- [Commits](executablebooks/sphinx-book-theme@v1.1.3...v1.1.4)

---
updated-dependencies:
- dependency-name: sphinx-book-theme
  dependency-version: 1.1.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -36,7 +36,7 @@ reuse==5.0.2
 snowballstemmer==2.2.0
 soupsieve==2.6
 Sphinx==8.1.3
-sphinx-book-theme==1.1.3
+sphinx-book-theme==1.1.4
 sphinxcontrib-applehelp==2.0.0
 sphinxcontrib-devhelp==2.0.0
 sphinxcontrib-htmlhelp==2.1.0