Align release artifact versioning with package metadata (0.6.2)

[Copilot]

Bug description

Release assets published under v0.6.1 were named slate-0.6.0-*, creating a version mismatch between tag/release and distributed binaries.

Root cause

electron-builder derives artifact names from package.json version, and the repository still had "version": "0.6.0" when v0.6.1 was tagged.

Fix

• Version alignment
  • Bumped app version in package.json from 0.6.0 to 0.6.2 so artifact naming matches the next release tag.
• Release notes continuity
  • Added 0.6.2 changelog entry documenting the artifact/version alignment fix.

{
  "name": "slate",
  "version": "0.6.2"
}

Steps to reproduce (before fix)

1. Create/tag a release after v0.6.0 while package.json still contains 0.6.0.
2. Run release packaging workflow.
3. Observe generated assets named slate-0.6.0-* under the newer release tag.

Screenshots

N/A

Checklist

• Fix tested locally
• Regression tested — existing behavior unaffected
• No hardcoded values introduced

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