[pre-commit.ci] auto fixes from pre-commit.com hooks

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src/sphinx_book_theme/__init__.py

@@ -1,4 +1,5 @@
 """A lightweight book theme based on the pydata sphinx theme."""
+
 import hashlib
 import os
 from pathlib import Path

src/sphinx_book_theme/_compile_translations.py

@@ -1,4 +1,5 @@
 """Generate compiled static translation assets for Sphinx."""
+
 import json
 import os
 from pathlib import Path

src/sphinx_book_theme/header_buttons/__init__.py

@@ -1,4 +1,5 @@
 """Generate metadata for header buttons."""
+
 from sphinx.errors import SphinxError
 from sphinx.locale import get_translation
 from pydata_sphinx_theme.utils import config_provided_by_user, get_theme_options_dict