Update README.md

README.md

@@ -52,20 +52,26 @@ pom.xml
 
 The `pom.xml` file is responsible for managing project dependencies and configuring the Java version.
 
-You need to add the required PostgreSQL JDBC driver dependency.
-
 Example:
 
 ```xml
-<dependencies>
+  <properties>
+    <maven.compiler.source>23</maven.compiler.source>
+    <maven.compiler.target>23</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  
+    <postgresql.version>42.7.8</postgresql.version>
+  </properties>
+  
+  <dependencies>
   
   <dependency>
     <groupId>org.postgresql</groupId>
     <artifactId>postgresql</artifactId>
-        <version>42.7.3</version>
+    <version>${postgresql.version}</version>
   </dependency>
   
-</dependencies>
+  </dependencies>
 ```
 
 This dependency allows your Java application to connect to PostgreSQL using JDBC.