📚 Fix RTD build (#322)

chrisjsewell · web-flow · commit a7544ee3931d · 2024-01-12T00:25:09.000+01:00
diff --git a/pyproject.toml b/pyproject.toml
@@ -53,7 +53,7 @@ rtd = [
     "sphinx",
     "sphinx-copybutton",
     "sphinx-design",
-    "sphinx_book_theme",
+    "sphinx-book-theme~=1.0",
     "jupyter_sphinx",
     "ipykernel",
 ]
