Makefile: fix release target

Author: rrthomas

Makefile

@@ -19,8 +19,8 @@ release-pypi:
 	twine upload dist/*
 
 release:
-	$(MAKE) test &&
-	$(MAKE) dist &&
+	$(MAKE) test && \
+	$(MAKE) dist && \
 	version=$$(grep version pyproject.toml | grep -o "[0-9.]\+") && \
 	twine upload dist/* && \
 	gh release create v$$version --title "Release v$$version" dist/* && \