Update vNext for selfhosted

[tomasmik]

Description of the change

This needs to be included in the next release.

Checklist

Please make sure that the proposed change checks all the boxes below before requesting a review:

• I have reviewed the guidelines for contributing to this repository.
• The preview looks fine.
• The tests pass.
• The commit history is clean and meaningful.
• The pull request is opened against the main branch.
• The pull request is no longer marked as a draft.
• You agree to license your contribution under the MIT license to Spacelift (not required for Spacelift employees).
• You have updated the navigation files correctly:
  • No new pages have been added, or;
  • Only nav.yaml has been updated because the changes only apply to SaaS, or;
  • Only nav.self-hosted.yaml has been updated because the changes only apply to Self-Hosted, or;
  • Both nav.yaml and nav.self-hosted.yaml have been updated.

If the proposed change is ready to be merged, please request a review from @spacelift-io/solutions-engineering. Someone will review and merge the pull request.

Spacelift employees should request reviews from the relevant engineers and are allowed to merge pull requests after they got at least one approval.

Thank you for your contribution! 🙇

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Note

Low Risk
Documentation-only change (changelog entry) with no code or behavior modifications in this repo.

Overview
Updates the Self-Hosted vNext changelog to document that the feature flag controlling inclusion of the push object in pull request push policy inputs has been removed, and that push is now only included when the event HeadCommit branch differs from the stack branch.

^{Written by Cursor Bugbot for commit 3c0b703. This will update automatically on new commits. Configure here.}

[michieldewilde]

🐐