docs: update bounds example to use 'world' instead of 'minecraft:overworld'

Author: NonSwag

content/docs/portals/index.mdx

@@ -145,5 +145,5 @@ Portals optionally integrates with WorldEdit for easier portal creation:
 
 Alternatively, you can specify bounds manually:
 ```
-/portal create <aqua>my-portal</aqua> <yellow>x1 y1 z1</yellow> <green>x2 y2 z2</green> <light_purple>minecraft:overworld</light_purple>
+/portal create <aqua>my-portal</aqua> <yellow>x1 y1 z1</yellow> <green>x2 y2 z2</green> <light_purple>world</light_purple>
 ```