add content type

.github/workflows/release.yml

@@ -70,3 +70,5 @@ jobs:
         upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
         asset_path: /home/runner/work/Blazor.Diagrams/Blazor.Diagrams/src/Blazor.Diagrams/bin/Release/*.nupkg
         asset_name: package
+        asset_content_type: application/zip
+