fix(ts): bad intersection caused type to be 'never' (#9477)

Author: konstantinblaesi

packages/core/src/providers/oauth.ts

@@ -239,9 +239,7 @@ export interface OAuth2Config<Profile>
 export interface OIDCConfig<Profile>
   extends Omit<OAuth2Config<Profile>, "type" | "checks"> {
   type: "oidc"
-  checks?: Array<
-    Exclude<OAuth2Config<Profile>["checks"], undefined>[number] | "nonce"
-  >
+  checks?: Array<NonNullable<OAuth2Config<Profile>["checks"]>[number] | "nonce">
 }
 
 export type OAuthConfig<Profile> = OIDCConfig<Profile> | OAuth2Config<Profile>