tour: [𝐟𝐚𝐥𝐥𝐭𝐡𝐫𝐨𝐮𝐠𝐡 is missing in the doc - it's important that it is part of it]

[devilsuse]

Context: https://go.dev/tour/flowcontrol/11

I learnt about 𝐟𝐚𝐥𝐥𝐭𝐡𝐫𝐨𝐮𝐠𝐡 keyword only through chatgpt. i definitely think it would be great if one page is added to discuss about 𝐟𝐚𝐥𝐥𝐭𝐡𝐫𝐨𝐮𝐠𝐡 so that if someone from other language background is migrating to Go would know how to write similar code. If not page, at least a small note can go a long way in making new developers aware of the language feature.