GH-14688 Use inter-document xref to fix Username and password link

GH-14688 Use inter-document xref to fix username and password link

Author: Lukas Dohmen

docs/modules/ROOT/pages/servlet/authentication/passwords/in-memory.adoc

@@ -3,7 +3,7 @@
 
 Spring Security's `InMemoryUserDetailsManager` implements xref:servlet/authentication/passwords/user-details-service.adoc#servlet-authentication-userdetailsservice[UserDetailsService] to provide support for username/password based authentication that is stored in memory.
 `InMemoryUserDetailsManager` provides management of `UserDetails` by implementing the `UserDetailsManager` interface.
-`UserDetails`-based authentication is used by Spring Security when it is configured to <<servlet-authentication-unpwd-input,accept a username and password>> for authentication.
+`UserDetails`-based authentication is used by Spring Security when it is configured to xref:servlet/authentication/passwords/index.adoc#servlet-authentication-unpwd-input[accept a username and password] for authentication.
 
 In the following sample, we use xref:features/authentication/password-storage.adoc#authentication-password-storage-boot-cli[Spring Boot CLI] to encode a password value of `password` and get the encoded password of `+{bcrypt}$2a$10$GRLdNijSQMUvl/au9ofL.eDwmoohzzS7.rmNSJZ.0FxO/BTk76klW+`: