Merge pull request graphql#812 from ismaelpadilla/source

Fixed typo in Entity GraphQL description

Author: caniszczyk

site/code/index.html.js

@@ -72,7 +72,7 @@ public class Program
 \`\`\`
 
   - [graphql-net](https://github.com/ckimes89/graphql-net): Convert GraphQL to IQueryable
-  - [Entity GraphQL](https://github.com/lukemurray/EntityGraphQL): .NET Core GraphQL library. Compiles to IQueryable to easily expose a schema from an exsiting data model (E.g. from an Entity Framework data model)
+  - [Entity GraphQL](https://github.com/lukemurray/EntityGraphQL): .NET Core GraphQL library. Compiles to IQueryable to easily expose a schema from an existing data model (E.g. from an Entity Framework data model)
   - [DotNetGraphQLQueryGen](https://github.com/lukemurray/DotNetGraphQLQueryGen): .NET Core library to generate classes from a GraphQL schema for type-safe querying in dotnet
   - [Hot Chocolate](https://github.com/ChilliCream/hotchocolate): GraphQL Server for .NET core and .NET classic