Update release CI to use trusted publishing

.github/workflows/release.yml

@@ -1,29 +1,27 @@
-name: ReleaseCmdStanPy
+name: Release CmdStanPy
 
 on:
   workflow_dispatch:
     inputs:
       new_version:
-        description: 'New version, for example: 0.9.69'
+        description: "New version, for example: 0.9.69"
         required: true
 
 jobs:
   release-cmdstanpy:
-    name: publish release and update read the docs default version
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-        python-version: [3.9]
-      fail-fast: false
+    name: publish release
+    runs-on: ubuntu-latest
+    environment: publishing
+    permissions:
+      id-token: write # OIDC
+      contents: write
+
     steps:
       - name: Check out source code
         uses: actions/checkout@v5
 
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python
         uses: actions/setup-python@v6
-        with:
-          python-version: ${{ matrix.python-version }}
 
       - name: Install os dependencies
         run: |
@@ -32,7 +30,7 @@ jobs:
 
       - name: Install dependencies (python)
         run: |
-          python -m pip install --upgrade pip wheel build twine requests
+          python -m pip install --upgrade pip wheel build
           pip install -e .[docs,test]
 
       - name: Install CmdStan
@@ -84,9 +82,9 @@ jobs:
       - name: Install bdist_wheel
         run: pip install dist/*.whl
 
-      - name: Upload to pypi
+      - name: Publish on PyPI
         if: success()
-        env:
-          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
-          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
-        run: python -m twine upload -u ${TWINE_USERNAME} -p ${TWINE_PASSWORD} --skip-existing dist/*
+        uses: pypa/[email protected]
+        with:
+          packages-dir: dist/
+          skip-existing: true