Bump sphinx-book-theme from 1.1.3 to 1.1.4 in /requirements

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-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements/docs.txt

@@ -2,4 +2,4 @@ autodocsumm==0.2.14
 huggingface-hub==0.29.0
 six==1.17.0
 sphinx==8.2.0
-sphinx-book-theme==1.1.3
+sphinx-book-theme==1.1.4