Fix javadox typo

core/src/main/java/org/springframework/security/authorization/AuthorizationManager.java

@@ -26,7 +26,7 @@ import org.springframework.security.core.Authentication;
  * An Authorization manager which can determine if an {@link Authentication} has access to
  * a specific object.
  *
- * @param <T> the type of object that the authorization check is being done one.
+ * @param <T> the type of object that the authorization check is being done on.
  * @author Evgeniy Cheban
  */
 @FunctionalInterface