[chore] Update README: TransferQueue has been adopted in Relax

[0oshowero0]

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[Copilot]

Pull request overview

Updates the project README’s “Updates” section to reflect a new external adoption milestone, keeping the repository’s status and integrations current for users.

Changes:

• Added a new April 15, 2026 update noting TransferQueue adoption in Relax and describing the scheduling approach.
• Kept the existing April 10, 2026 verl integration entry, shifting it down in the list.

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0oshowero0, thanks for your pull request. All authors of the commits have signed the CLA. 👍