Publishing a package no longer creates a release and other GitHub Package Registry updates

When publishing a package in GitHub Package Registry, a release and corresponding tag will no longer be created. When publishing a package with a version corresponding to an existing tag and release, the package is automatically associated with that release.

Support for using the GitHub Actions `GITHUB_TOKEN` to access packages in GitHub Package Registry has also been extended to NuGet packages. You can now publish and consume NuGet packages from Actions by adding `GITHUB_TOKEN` to your NuGet.config file as a password.