docs(release-notes): merge 7.2.8-rc.2 into 7.2.8.md

[elibosley]

Summary

• Removes the standalone 7.2.8-rc.2.md release notes file and folds its updates into 7.2.8.md, matching the single rolling-file pattern used for other releases (e.g. 7.3.2.md).
• Updates 7.2.8.md title/date to rc.2 (2026-07-28), Linux kernel to 6.12.98-Unraid, and the corresponding ZFS package version, while preserving the full cumulative changelog vs. 7.2.7.

Test plan

• Diffed the two source files to confirm the only substantive rc.2 delta was the kernel bump (6.12.96 -> 6.12.98) and matching ZFS version string.
• Verified no other release version in this repo maintains a separate -rc.N file alongside the version's main file.

Summary by CodeRabbit

• Documentation
  • Updated Unraid OS 7.2.8 release notes to reflect release candidate 2.
  • Updated references to Linux kernel 6.12.98-Unraid.
  • Updated compatibility information and the ZFS package version accordingly.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 26de81e7-1f5d-42c8-8ab3-fbfe4badc694

📥 Commits

Reviewing files that changed from the base of the PR and between f5bbd1a and 515ea42.

📒 Files selected for processing (2)

• docs/unraid-os/release-notes/7.2.8-rc.2.md
• docs/unraid-os/release-notes/7.2.8.md

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📝 Walkthrough

Walkthrough

The 7.2.8 release notes were updated from rc.1 to rc.2, with kernel and kernel-coupled ZFS references changed from 6.12.96-Unraid to 6.12.98-Unraid.

Changes

Release note version alignment

Layer / File(s)	Summary
Kernel and ZFS release references docs/unraid-os/release-notes/7.2.8.md	Updates the release candidate metadata and all specified kernel and ZFS references to 6.12.98-Unraid.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Possibly related PRs

• unraid/docs#476: Updates related release-note Linux kernel and ZFS version references.
• unraid/docs#515: Updates the same 7.2.8 release notes from rc.1 to rc.2.
• unraid/docs#518: Adds related 7.2.8 rc.2 kernel and ZFS version references.

Suggested reviewers: unraid-bot

Poem

I’m a rabbit with notes in my paws,
Updating kernels without any flaws.
Six-twelve-point-nine-eight shines bright,
ZFS follows it just right.
RC two now hops into sight!

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/merge-7.2.8-rc2

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