vendor/README.md conflicted: main took hayro-interpret patch 104 (RGB
colours in isolated DeviceCMYK groups). This branch's viewer overrides
become patches 105 (annotation_overrides) and 106 (appearance_overrides)
in the README, in vendor/hayro-interpret/src/interpret/mod.rs, in the
raster test and in docs/acroform-script-workflows.md.