Update org.springframework.boot.version to v4

Author: xdev-renovate

advanced-demo/pom.xml

@@ -21,7 +21,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-		<org.springframework.boot.version>3.5.7</org.springframework.boot.version>
+		<org.springframework.boot.version>4.0.0</org.springframework.boot.version>
 	</properties>
 
 	<modules>