Use tox to define the "release" command

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: Release
+
+on:
+  push:
+    tags:
+    - '*'
+
+jobs:
+  release:
+    runs-on: ubuntu-22.04
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install tox
+    - name: Publish release
+      env:
+        TWINE_USERNAME: __token__
+        TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+      run: |
+        tox -e release

tox.ini

@@ -29,3 +29,12 @@ description = Build the Python package.
 commands =
     pyproject-build .
     twine check --strict dist/*
+
+[testenv:release]
+description = Publish a new release on PyPI.
+passenv =
+    TWINE_USERNAME
+    TWINE_PASSWORD
+commands =
+    {[testenv:packaging]commands}
+    twine upload dist/* --disable-progress-bar --verbose