Fix luau url in luau docs (#1205)

## Changes

Fixes luau url pointing to https://luau-lang.org instead of
https://luau.org

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Author: gaymeowing

content/en-us/luau/index.md

@@ -3,7 +3,7 @@ title: Luau
 description: Luau is the scripting language creators use in Roblox Studio.
 ---
 
-[Luau](https://luau-lang.org) is the scripting language creators use in Roblox Studio. It is a fast, small, safe, gradually typed embeddable scripting language derived from [Lua 5.1](https://www.lua.org/manual/5.1/).
+[Luau](https://luau.org) is the scripting language creators use in Roblox Studio. It is a fast, small, safe, gradually typed embeddable scripting language derived from [Lua 5.1](https://www.lua.org/manual/5.1/).
 
 <Alert severity="success">
 Contributing your Luau scripts for AI training can help enhance Luau-focused AI tools in Studio. For more information, see [Empower Luau creation](https://create.roblox.com/data-collection).