Upgrade fleek deployment - applies to TESTING, STAGING and PRODUCTION deployments

[levalleux-ludo]

Current deployment on fleek is failing since fleek.co migrated to fleek.xyz
Documentation for migration: https://fleek.xyz/docs/cli/#migrating-from-fleekco-to-fleek-platform-cli

Current error while GH pipeline trying to deploy:

https://github.com/bosonprotocol/interface/actions/runs/12469617108/job/34803134806

NOTE: deployments URL are changing from xxx.on.fleek.co to xxx.on-fleek.app
This implies changes in configuration for WIDGET URL, DR-CENTER URL, etc.
DNS Record (bosonapp.io, widgets.bosonprotocol.io, disputes.bosonprotocol.io) may have to be upgraded to

[levalleux-ludo]

fixed with #1116