Update publish.yml

Author: Tom Augspurger

.github/workflows/publish.yml

@@ -14,7 +14,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      # retrieve your distributions here
+      - uses: actions/checkout@v2
       - name: Set up Python 3.x
         uses: actions/setup-python@v2
         with:
@@ -30,4 +30,4 @@ jobs:
           python -m build
 
       - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@release/v1