Update the documentation of AuthenticationProvider.java

"Authentication" is an interface, not a class. So, It's not correct to say 'instance of the Authentication class.

Author: Ali-Hassan33

core/src/main/java/org/springframework/security/authentication/AuthenticationProvider.java

@@ -47,7 +47,7 @@ public interface AuthenticationProvider {
 	 * <p>
 	 * Returning <code>true</code> does not guarantee an
 	 * <code>AuthenticationProvider</code> will be able to authenticate the presented
-	 * instance of the <code>Authentication</code> class. It simply indicates it can
+  	 * <code>Authentication</code> object. It simply indicates it can
 	 * support closer evaluation of it. An <code>AuthenticationProvider</code> can still
 	 * return <code>null</code> from the {@link #authenticate(Authentication)} method to
 	 * indicate another <code>AuthenticationProvider</code> should be tried.