Bump sphinx-book-theme from 1.0.1 to 1.1.0

Bumps [sphinx-book-theme](https://github.com/executablebooks/sphinx-book-theme) from 1.0.1 to 1.1.0.
- [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@v1.0.1...v1.1.0)

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

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

docs/requirements.txt

@@ -8,7 +8,7 @@ sphinx-copybutton==0.5.2
 sphinxemoji==0.2.0
 sphinx-jsonschema==1.19.1
 sphinx-version-warning==1.1.2
-sphinx-book-theme==1.0.1
+sphinx-book-theme==1.1.0
 sphinx-external-toc>=0.3.0
 sphinx-inline-tabs
 sphinx-thebe==0.2.1