chore(docs): Typo in GraphQL Typegen doc

Author: LekoArts

docs/docs/how-to/local-development/graphql-typegen.md

@@ -75,7 +75,7 @@ For this example to work you'll have to have a `title` inside your `siteMetadata
    <p>Site title: {data.site?.siteMetadata?.title}</p>
    ```
 
-### Configuration the gatsby-config option
+### Configuring the gatsby-config option
 
 Instead of setting a boolean value for the `graphqlTypegen` option in `gatsby-config` you can also set an object to configure it. See all details in the [gatsby-config documentation](/docs/reference/config-files/gatsby-config/#graphqltypegen).