Immutable github releases

[LogFlames]

JRleaser 1.21.0 now has support immutable github releases.

GitHub Immutable releases: https://github.blog/changelog/2025-10-28-immutable-releases-are-now-generally-available/
JReleaser 1.21.0 release notes: https://github.com/jreleaser/jreleaser/releases/tag/v1.21.0

The current flake lockfile is for rev 2fb006b87f04c4d3bdf08cfdbc7fab9c13d94a15, updated in #6511. This uses version 1.20.0 of jreleaser: https://github.com/NixOS/nixpkgs/blob/2fb006b87f04c4d3bdf08cfdbc7fab9c13d94a15/pkgs/by-name/jr/jreleaser-cli/package.nix.

As soon as this updated to 1.21.0, immutable releases can be enabled. This required two actions:

• Enable immutable releases on the github repository. This is done under Settings > General > Releases > Enable immutable releases.
• Modify the jreleaser github release config to support immutable releases:

   release:
     github:
       owner: INRIA
+++    immutableRelease: true
       prerelease:
         pattern: .*beta.*
       changelog:
         formatted: ALWAYS
         preset: conventional-commits
         format: '- {{commitShortHash}} {{commitTitle}}'
         contributors:
           format: '- {{contributorName}} ({{contributorUsernameAsLink}})'
         hide:
           contributors:
             - '[bot]'
             - 'GitHub'

This modification makes JReleaser use the workflow create draft > upload assets > release release instead of the default create release (not draft) > upload assets. As, when the immutable release has been created, it cannot be modified and no assets can be uploaded.

[I-Al-Istannen]

I have already updated it upstream NixOS/nixpkgs#457248 and it is in unstable, so the next sync should bring it over :) I have triggered a manual rerun of renovate in #6519.