Create a draft release (prep for immutable)

GitHub now supports immutable releases, which this project plans to use.

Best practice is to create a draft release first, then release it once all the artifacts have been added, release notes written, etc.

https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/immutable-releases

Author: onethumb

.github/workflows/release.yml

@@ -630,7 +630,7 @@ jobs:
         uses: softprops/action-gh-release@6da8fa9354ddfdc4aeace5fc48d7f679b5214090 # pinned commit for 2.4.1
         with:
           files: release-assets/*
-          draft: false
+          draft: true
           prerelease: false
           fail_on_unmatched_files: true
           generate_release_notes: true