Bug#964496: libjson-validator-perl: URL is gone, this is now RC

[Wouter Verhelst]

Package: libjson-validator-perl
Version: 4.10+dfsg-1
Followup-For: Bug #964496
Control: severity -1 serious

This bug is still present. Additionally, the URL for the OpenAPI JSON
scheme now returns a 404 error, which means that any software using
OpenAPI on Debian with this bug present will fail to function correctly.

Please fix this bug before the release of bullseye.