Add @author tags for JDBC KeyHolder support

See gh-24655

spring-jdbc/src/main/java/org/springframework/jdbc/support/GeneratedKeyHolder.java

@@ -35,6 +35,7 @@ import org.springframework.lang.Nullable;
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
+ * @author Slawomir Dymitrow
  * @since 1.1
  */
 public class GeneratedKeyHolder implements KeyHolder {

spring-jdbc/src/main/java/org/springframework/jdbc/support/KeyHolder.java

@@ -38,6 +38,7 @@ import org.springframework.lang.Nullable;
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
+ * @author Slawomir Dymitrow
  * @since 1.1
  * @see org.springframework.jdbc.core.JdbcTemplate
  * @see org.springframework.jdbc.object.SqlUpdate