JAVA-18131 Adjust core-java-jvm PrintClassLoaders to sync with article (#13780)

Author: anastasiosioannidis

Diff for: core-java-modules/core-java-jvm/src/main/java/com/baeldung/classloader/PrintClassLoader.java

@@ -1,12 +1,15 @@
 package com.baeldung.classloader;
 
+import java.sql.DriverManager;
+
 import java.util.ArrayList;
 
 public class PrintClassLoader {
 
     public void printClassLoaders() throws ClassNotFoundException {
 
         System.out.println("Classloader of this class:" + PrintClassLoader.class.getClassLoader());
+        System.out.println("Classloader of DriverManager:" + DriverManager.class.getClassLoader());
         System.out.println("Classloader of ArrayList:" + ArrayList.class.getClassLoader());
 
     }