📦 Release 1.3.1 — Update Eclipse Marketplace Listing

[github-actions]

Release 1.3.1

A new Sandbox release was published.

Field	Value
Release	v1.3.1
GitHub Release	https://github.com/carstenartur/sandbox/releases/tag/v1.3.1
Composite Update Site	https://carstenartur.github.io/sandbox/releases/
Version-specific Update Site	https://carstenartur.github.io/sandbox/releases/1.3.1/
Marketplace Edit	https://marketplace.eclipse.org/content/sandbox/edit

Checklist

• Update the Eclipse Marketplace solution version to 1.3.1
• Verify the update site URL points to https://carstenartur.github.io/sandbox/releases/
• Verify Eclipse and Java compatibility information
• Update screenshots and description if needed
• Test installation from the Marketplace