Update desktop changelog for v0.12.575 [skip ci]
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2h ago+18+18+01234567890123456789-17-17-01234567890123456789
Auto-generated: consolidates unreleased changelog fragments into v0.12.575 and regenerates CHANGELOG.json.
Auto-generated: consolidates unreleased changelog fragments into v0.12.575 and regenerates CHANGELOG.json.