fixed version

Author: dliubarskyi

langchain4j-easy-rag-spring-boot-starter/pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>dev.langchain4j</groupId>
         <artifactId>langchain4j-spring</artifactId>
-        <version>1.8.0-beta15-SNAPSHOT</version>
+        <version>1.12.0-beta20-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>