⬆️ Update sphinx-book-theme requirement from ~=1.0.1 to ~=1.1.2

Updates the requirements on [sphinx-book-theme](https://github.com/executablebooks/sphinx-book-theme) to permit the latest version.
- [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...v1.1.2)

---
updated-dependencies:
- dependency-name: sphinx-book-theme
  dependency-type: direct:production
...

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

pyproject.toml

@@ -53,7 +53,7 @@ tests = [
 docs = [
     'sphinx~=6.2.1',
     'sphinx-copybutton~=0.5.2',
-    'sphinx-book-theme~=1.0.1',
+    'sphinx-book-theme~=1.1.2',
     'sphinx-click~=5.1.0',
     'sphinx-design~=0.5.0',
     'sphinxcontrib-details-directive~=0.1.0',