CHANGELOG.md: Add entry specifying vab820-quad has switched to using the resin-image-flasher
CHANGELOG.md: Add entry specifying vab820-quad has
switched to using the resin-image-flasher

Signed-off-by: Jon Grisky <44f878afe53efc66b76772bd845eb65944ed8232@resin.io>

resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin