Fixed Duende.IdentityModel index page

The current text makes no sense.

Author: adamralph

src/content/docs/identitymodel/index.mdx

@@ -14,8 +14,9 @@ import { CardGrid, LinkCard } from "@astrojs/starlight/components";
 The `Duende.IdentityModel` package is the base library for OpenID Connect and OAuth 2.0 related protocol
 operations. It provides an object model to interact with the endpoints defined in the
 various OAuth and OpenId Connect specifications. The types included represent the
-requests and responses, in addition to extension methods to invoke requests constants defined in the
-specifications, such as standard scope, claim, and parameter names, and other convenience
+requests and responses, and constants defined in the
+specifications, such as standard scope, claim, and parameter names.
+The library also contains extension methods to invoke requests and other convenience
 methods for performing common identity related operations.
 
 <CardGrid>