Use upload-artifact@v4 instead of the deprecated v2

Author: CdnCentreForChildProtection

.github/workflows/build-and-release.yml

@@ -22,7 +22,7 @@ jobs:
         run: |
             poetry publish --build --repository pypi
       - name: Save built package.
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
             name: release-${{ github.event.release.id }}
             path: dist/