Fix release sdist packaging

.github/workflows/python-publish.yml

@@ -69,3 +69,4 @@ jobs:
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
           packages-dir: dist/
+          skip-existing: true

pyproject.toml

@@ -43,3 +43,4 @@ manifest-path = "gamdl/downloader/ammuxer/Cargo.toml"
 module-name = "gamdl._ammuxer"
 python-source = "."
 features = ["pyo3/extension-module"]
+include = ["LICENSE"]