orcaslicer: Update to version 2.4.2, fix autoupdate, add arm64 support

[mastqe]

Fixes package installer url and update to newest release.

Closes #18267

• Use conventional PR title: <manifest-name[@version]|chore>: <general summary of the pull request>
• I have read the Contributing Guide

[coderabbitai]

📝 Walkthrough

Walkthrough

The change updates the OrcaSlicer package manifest to version 2.4.2, changes the homepage to the OrcaSlicer GitHub repository, updates the Windows x64 portable release URL and SHA256 hash, and corrects the autoupdate URL templates so x64 and arm64 builds use their respective portable artifacts.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The URL fix and filename update match the issue’s requirement for the newer _x64 release naming since v2.4.1.
Out of Scope Changes check	✅ Passed	The changes stay focused on the package version bump and download URL corrections, with no clearly unrelated edits.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Title check	✅ Passed	Conventional format is followed and the title matches the main changes: version bump, autoupdate fix, and arm64 support.
Description check	✅ Passed	It includes a short summary, links the issue, and completes the required checklist items.

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[aliesbelik]

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[github-actions]

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orcaslicer

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• Description
• License
• Hashes
• Checkver
• Autoupdate

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