Update Embedded javadoc

Signed-off-by: Tran Ngoc Nhan <ngocnhan.tran1996@gmail.com>

Author: ngocnhan-tran1996

spring-data-relational/src/main/java/org/springframework/data/relational/core/mapping/Embedded.java

@@ -31,7 +31,7 @@
  * Depending on the {@link OnEmpty value} of {@link #onEmpty()} the property is set to {@literal null} or an empty
  * instance in the case all embedded values are {@literal null} when reading from the result set.
  * </p>
- * 
+ *
  * @author Bastian Wilhelm
  * @author Christoph Strobl
  * @since 1.1
@@ -46,8 +46,8 @@
 	 * <p>
 	 * {@link Nullable @Embedded.Nullable} and {@link Empty @Embedded.Empty} offer shortcuts for this.
 	 * </p>
-	 * 
-	 * @return never {@link} null.
+	 *
+	 * @return never {@code null}.
 	 */
 	OnEmpty onEmpty();