CI/CD update

Author: davidhjp01

.github/workflows/ci-main.yml

@@ -63,14 +63,14 @@ jobs:
     needs:
       - test
     runs-on: 'ubuntu-latest'
-    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
     steps:
       - uses: actions/checkout@v3
       - name: Install build
         run: pip install build
       - name: Build source
         run: python -m build --sdist
       - uses: actions/upload-artifact@v4
+        if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
         name: Upload artifact (source)
         with:
           name: libcosimpy-${{ github.ref_name }}-source