If I go to https://substrate.io/developers/smart-contracts/ and click on any of the 6x hyperlinks called Open ink! Playground it takes me to https://ink-playground.substrate.io/ and returns
404 page not found.
But at https://substrate.io/developers/smart-contracts/ if I click the Developer > Playground link in the footer it takes me to https://substrate.io/developers/playground/ where I can launch Substrate Node Template at https://playground.substrate.dev/?deploy=node-template or launch Substrate Front-End Template at https://playground.substrate.dev/?deploy=front-end-template.
Why are the all the ink! Playground links broken and does the official Substrate docs website use a broken link validator tool to update a site service health status page anywhere?