minor changes

Author: FrancescoSaverioZuppichini

.github/workflows/publish.yml

@@ -13,8 +13,7 @@ jobs:
     steps:
       - name: 🛎️ Checkout
         uses: actions/checkout@v3
-        with:
-          ref: ${{ github.head_ref }}
+        run: git checkout HEAD^
       - name: 🐍 Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with: