fix: incorrect URL for address book (#337)

src/pages/world-chain/developers/template.mdx

@@ -155,7 +155,7 @@ anvil -f $RPC_URL
 ```
 
 We need to also set three important environment variables that are required for the deployment of the World ID template app:
-- `WORLD_ID_ROUTER`: The address of the World ID router contract that will verify the proofs (can be found in the [World ID documentation](https://docs.worldcoin.org/reference/address-book))
+- `WORLD_ID_ROUTER`: The address of the World ID router contract that will verify the proofs (can be found in the [World ID documentation](https://docs.worldcoin.org/world-chain/reference/address-book))
 - `NEXT_PUBLIC_APP_ID`: The app ID that was generated in the [Developer Portal](https://developer.worldcoin.org/login)
 - `NEXT_PUBLIC_ACTION`: The action ID as configured in the [Developer Portal](https://developer.worldcoin.org/login)