fix optional dependency

Author: clintonsteiner

.github/workflows/sphinx-build.yml

@@ -19,7 +19,7 @@ jobs:
           enable-cache: true
 
       - name: Sync UV
-        run: uv sync --group docs
+        run: uv sync --extra docs
 
       - name: Build HTML
         run: uv run sphinx-build -b html docs docs/_build/html

pyproject.toml

@@ -74,10 +74,6 @@ dev = [
     "wheel>=0.21.0",
     "astor>=0.8.1",
 ]
-docs = [
-   "sphinx",
-   "sphinx-rtd-theme",
-]
 
 [project.urls]
 Homepage = "https://github.com/akaihola/darker"
@@ -94,6 +90,12 @@ none = "darker.formatters.none_formatter:NoneFormatter"
 [project.scripts]
 darker = "darker.__main__:main_with_error_handling"
 
+[project.optional-dependencies]
+docs = [
+    "sphinx>=7.4.7",
+    "sphinx-rtd-theme>=3.0.2",
+]
+
 [tool.black]
 # Darker makes Black read its configuration from the file indicated by the `--config`
 # option, so we need to mirror the same configuration here and in `check-darker.toml`.