[JAVA-26243] Upgraded spring-di-3 module to spring-boot 3 (#14997)

spring-di-4/pom.xml

@@ -9,9 +9,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>parent-boot-3</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-boot-2</relativePath>
+        <relativePath>../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-di-4/src/main/java/com/baeldung/sampleabstract/BallService.java

@@ -2,7 +2,7 @@ package com.baeldung.sampleabstract;
 
 import org.springframework.beans.factory.annotation.Autowired;
 
-import javax.annotation.PostConstruct;
+import jakarta.annotation.PostConstruct;
 
 public abstract class BallService {