Bump sphinx-book-theme from 1.1.2 to 1.1.3 (#798)

Bumps [sphinx-book-theme](https://github.com/executablebooks/sphinx-book-theme) from 1.1.2 to 1.1.3.
- [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@v1.1.2...v1.1.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -36,7 +36,7 @@ reuse==3.0.2
 snowballstemmer==2.2.0
 soupsieve==2.5
 Sphinx==7.4.7
-sphinx-book-theme==1.1.2
+sphinx-book-theme==1.1.3
 sphinxcontrib-applehelp==1.0.8
 sphinxcontrib-devhelp==1.0.6
 sphinxcontrib-htmlhelp==2.0.5