Add a Publishing workflow

.github/workflows/CI.yml

@@ -9,6 +9,9 @@ on:
       - '*'
   pull_request:
   workflow_dispatch:
+  release:
+    types:
+      - published
 
 permissions:
   contents: read
@@ -172,17 +175,24 @@ jobs:
           name: wheels-sdist
           path: dist
 
-  release:
-    name: Release
+  publish:
+    name: Publish Python distributions to PyPI
     runs-on: ubuntu-latest
-    if: "startsWith(github.ref, 'refs/tags/')"
+    if: github.event_name == 'release' && github.event.action == 'published'
     needs: [linux, musllinux, windows, macos, sdist]
+    environment:
+      name: pypi
+      url: https://pypi.org/p/rfc3161-client
+    permissions:
+      # Used to sign the release's artifacts with sigstore-python.
+      # Used to publish to PyPI with Trusted Publishing.
+      id-token: write
     steps:
       - uses: actions/download-artifact@v4
-      - name: Publish to PyPI
-        uses: PyO3/maturin-action@v1
-        env:
-          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
         with:
-          command: upload
-          args: --non-interactive --skip-existing wheels-*/*
+          path: dist/
+          merge-multiple: true
+      - name: Publish distributions
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          attestations: true