Fix javadoc escape of @ character (aws#2967)

Author: debora-ito

services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/mapper/annotations/DynamoDbIgnoreNulls.java

@@ -30,13 +30,13 @@
  * <p>
  * Example using {@link DynamoDbIgnoreNulls}:
  * <pre>
- * {@code
- * @DynamoDbBean
+ * <code>
+ * &#64;DynamoDbBean
  * public class NestedBean {
  *     private AbstractBean innerBean1;
  *     private AbstractBean innerBean2;
  *
- *     @DynamoDbIgnoreNulls
+ *     &#64;DynamoDbIgnoreNulls
  *     public AbstractBean getInnerBean1() {
  *         return innerBean1;
  *     }
@@ -67,7 +67,7 @@
  *
  * // innerBean2 w/o @DynamoDbIgnoreNulls has a NULLL attribute.
  * assertThat(nestedBean.getInnerBean2(), hasEntry("attribute", nullAttributeValue()));
- * }
+ * </code>
  * </pre>
  */
 @SdkPublicApi

services-custom/dynamodb-enhanced/src/main/java/software/amazon/awssdk/enhanced/dynamodb/mapper/annotations/DynamoDbPreserveEmptyObject.java

@@ -31,13 +31,13 @@
  * <p>
  * Example using {@link DynamoDbPreserveEmptyObject}:
  * <pre>
- * {@code
- * @DynamoDbBean
+ * <code>
+ * &#64;DynamoDbBean
  * public class NestedBean {
  *     private AbstractBean innerBean1;
  *     private AbstractBean innerBean2;
  *
- *     @DynamoDbPreserveEmptyObject
+ *     &#64;DynamoDbPreserveEmptyObject
  *     public AbstractBean getInnerBean1() {
  *         return innerBean1;
  *     }
@@ -69,7 +69,7 @@
  *
  * // innerBean2 w/o @DynamoDbPreserveEmptyObject is mapped to null.
  * assertThat(nestedBean.getInnerBean2(), isNull());
- * }
+ * </code>
  * </pre>
  */
 @SdkPublicApi