fix(docs): update Spring Boot version and add note about version auto-selection (#23407)

Author: 2003Aditya

content/get-started/docker-concepts/building-images/multi-stage-builds.md

@@ -58,7 +58,10 @@ In this hands-on guide, you'll unlock the power of multi-stage builds to create
 1. [Download and install](https://www.docker.com/products/docker-desktop/) Docker Desktop.
 
 
-2. Open this [pre-initialized project](https://start.spring.io/#!type=maven-project&language=java&platformVersion=3.4.0-M3&packaging=jar&jvmVersion=21&groupId=com.example&artifactId=spring-boot-docker&name=spring-boot-docker&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.spring-boot-docker&dependencies=web) to generate a ZIP file. Here’s how that looks:
+
+2. Open this [pre-initialized project](https://start.spring.io/#!type=maven-project&language=java&platformVersion=3.4.11&packaging=jar&jvmVersion=21&groupId=com.example&artifactId=spring-boot-docker&name=spring-boot-docker&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.spring-boot-docker&dependencies=web) to generate a ZIP file.
+
+> **Note:** The Spring Boot version in this example (`3.4.11`) may differ in the future as newer versions are released. Spring Initializr will automatically select the latest compatible version if the specified one is unavailable.
 
 
     ![A screenshot of Spring Initializr tool selected with Java 21, Spring Web and Spring Boot 3.4.0](images/multi-stage-builds-spring-initializer.webp?border=true)