fix broken link/created-subgraph-hosted.mdx (#116)

Author: Slava-g1

pages/en/developer/create-subgraph-hosted.mdx

@@ -553,7 +553,7 @@ A common pattern in Ethereum smart contracts is the use of registry or factory c
 
 ### Data Source for the Main Contract
 
-First, you define a regular data source for the main contract. The snippet below shows a simplified example data source for the [Uniswap](https://uniswap.io) exchange factory contract. Note the `NewExchange(address,address)` event handler. This is emitted when a new exchange contract is created on-chain by the factory contract.
+First, you define a regular data source for the main contract. The snippet below shows a simplified example data source for the [Uniswap](https://uniswap.org) exchange factory contract. Note the `NewExchange(address,address)` event handler. This is emitted when a new exchange contract is created on-chain by the factory contract.
 
 ```yaml
 dataSources: