Make it possible to run docs help without virtualenv

Author: adamtheturtle

docs/Makefile

@@ -10,7 +10,7 @@ BUILDDIR      = build
 
 # Put it first so that "make" without argument is like "make help".
 help:
-	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+	@uv run --extra=dev $(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
 
 .PHONY: help Makefile