Update website/pages/en/subgraphs.mdx

Co-authored-by: Benoît Rouleau <[email protected]>

Author: idalithb

website/pages/en/subgraphs.mdx

@@ -24,7 +24,7 @@ The **subgraph definition** consists of the following files:
 
 - `mapping.ts`: [AssemblyScript Mappings](https://github.com/AssemblyScript/assemblyscript) code that translates event data into entities defined in your schema
 
-To learn more about each of subgraph component, check out [creating a subgraph](/developing/creating-a-subgraph/).
+To learn more about each subgraph component, check out [creating a subgraph](/developing/creating-a-subgraph/).
 
 ## Subgraph Development