Fix typo

Author: MichaelMacaulay

website/src/pages/en/subgraphs/querying/graphql-api.mdx

@@ -16,7 +16,7 @@ Explore the GraphQL Query API for interacting with Subgraphs on The Graph Networ
 - **Usage**: Foundation for all query operations
 
 ### Schema
-- **Purpose**: Blueprint defining  the data structure and relationships using GraphQL [IDL](https://facebook.github.io/graphql/draft/#sec-Type-System)
+- **Purpose**: Blueprint defining the data structure and relationships using GraphQL [IDL](https://facebook.github.io/graphql/draft/#sec-Type-System)
 - **Key characteristics**:
   - Auto-generates query endpoints
   - Read-only operations (no mutations)