Re-order publish steps so artifact isn't deleted by checkout (#54)

Signed-off-by: Thijs Baaijen <[email protected]>

Author: Thijss

.github/workflows/build-test-and-sonar.yml

@@ -141,6 +141,10 @@ jobs:
       TWINE_PASSWORD: ${{ secrets.PYPI_PASS }}
     runs-on: ubuntu-latest
     steps:
+
+      - name: Checkout source code
+        uses: actions/checkout@v4  # needed by 'Prevent automatic major/minor release'
+
       - name: Setup Python 3.11
         uses: actions/setup-python@v5
         with:
@@ -152,10 +156,6 @@ jobs:
           name: power-grid-model-ds
           path: wheelhouse/
 
-      - name: Checkout source code
-        if: (github.event_name == 'push')
-        uses: actions/checkout@v4  # needed by 'Prevent automatic major/minor release'
-
       - name: Prevent automatic major/minor release
         if: (github.event_name == 'push')
         run: |