[release-1.9-post-cqa] [RHDHBUGS-413]: Fix incorrect auth provider resolvers for GitHub (#2040)

Co-authored-by: Fabrice Flore-Thébault <ffloreth@redhat.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

modules/shared/snip-enabling-user-authentication-with-github-optional-authentication-provider-steps.adoc

@@ -47,13 +47,13 @@ Enter the sign-in resolver name.
 Available resolvers:
 
 * `usernameMatchingUserEntityName`
-* `preferredUsernameMatchingUserEntityName`
+* `emailLocalPartMatchingUserEntityName`
 * `emailMatchingUserEntityProfileEmail`
 
 `dangerouslyAllowSignInWithoutUserInCatalog`::::
 Enter `true` to configure the sign-in resolver to bypass the user provisioning requirement in the {product-short} software catalog.
 +
 [WARNING]
 ====
-In production more, do not enable `dangerouslyAllowSignInWithoutUserInCatalog`.
+In production mode, do not enable `dangerouslyAllowSignInWithoutUserInCatalog`.
 ====