Update README.md

Author: AnghelLeonard

HibernateSpringBootHintPassDistinctThrough/README.md

@@ -1,4 +1,4 @@
-13. **[Optimize Distinct SELECTs Via HINT_PASS_DISTINCT_THROUGH Hint](https://github.com/AnghelLeonard/Hibernate-SpringBoot/tree/master/HibernateSpringBootHintPassDistinctThrough)**
+**[Optimize Distinct SELECTs Via HINT_PASS_DISTINCT_THROUGH Hint](https://github.com/AnghelLeonard/Hibernate-SpringBoot/tree/master/HibernateSpringBootHintPassDistinctThrough)**
 
 **Description:** Starting with Hibernate 5.2.2, we can optimize `SELECT DISTINCT` via `HINT_PASS_DISTINCT_THROUGH` hint
 
@@ -7,3 +7,4 @@
 
 **Output example:**\
 ![](https://github.com/AnghelLeonard/Hibernate-SpringBoot/blob/master/HibernateSpringBootHintPassDistinctThrough/sample.png)
+<a href="https://leanpub.com/java-persistence-performance-illustrated-guide"><p align="center"><img src="https://github.com/AnghelLeonard/Hibernate-SpringBoot/blob/master/Java%20Persistence%20Performance%20Illustrated%20Guide.jpg" height="410" width="350"/></p></a>