github: Update dawidd6/action-download-artifact to v27

This should avoid issues where the action spuriously fetches older
runs than expected.

.github/workflows/release.yml

@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download artifacts
-        uses: dawidd6/action-download-artifact@v19
+        uses: dawidd6/action-download-artifact@v27
         with:
           workflow: build.yml
           workflow_conclusion: success