fix release workflow to not generate prereleases

Author: bckohan

.github/workflows/release.yml

@@ -144,7 +144,6 @@ jobs:
         "$GITHUB_REF_NAME"
         --repo "$GITHUB_REPOSITORY"
         --generate-notes
-        --prerelease
     - name: Upload artifact signatures to GitHub Release
       env:
         GITHUB_TOKEN: ${{ github.token }}