Add trusted publisher release workfiow

Author: sbidoul

.github/workflows/release.yml

@@ -0,0 +1,46 @@
+name: Publish Python 🐍 distribution 📦 to PyPI
+
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  build:
+    name: Build distribution 📦
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+      - name: Build a binary wheel and a source tarball
+        run: pipx run build
+      - name: Store the distribution packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+
+  publish-to-pypi:
+    name: >-
+      Publish Python 🐍 distribution 📦 to PyPI
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/project/pip/${{ github.ref_name }}
+    permissions:
+      id-token: write  # IMPORTANT: mandatory for trusted publishing
+
+    steps:
+      - name: Download all the dists
+        uses: actions/download-artifact@v4
+        with:
+          name: python-package-distributions
+          path: dist/
+      - name: Publish distribution 📦 to PyPI
+        uses: pypa/gh-action-pypi-publish@release/v1

docs/html/development/release-process.rst

@@ -146,11 +146,8 @@ Creating a new release
    This will update the relevant files and tag the correct commit.
 #. Submit the ``release/YY.N`` branch as a pull request and ensure CI passes.
    Merge the changes back into ``main`` and pull them back locally.
-#. Build the release artifacts using ``nox -s build-release -- YY.N``.
-   This will checkout the tag, generate the distribution files to be
-   uploaded and checkout the main branch again.
-#. Upload the release to PyPI using ``nox -s upload-release -- YY.N``.
-#. Push the tag created by ``prepare-release``.
+#. Push the tag created by ``prepare-release``. This will trigger the release
+   workflow on GitHub and publish to PyPI.
 #. Regenerate the ``get-pip.py`` script in the `get-pip repository`_ (as
    documented there) and commit the results.
 #. Submit a Pull Request to `CPython`_ adding the new version of pip