Update to Spring-Boot 4.0.0-M3

Author: afranken

pom.xml

@@ -127,7 +127,7 @@
     <skipDocker>false</skipDocker>
     <sortpom-maven-plugin.version>4.0.0</sortpom-maven-plugin.version>
     <!--  TODO: update to 4.0.0 after Spring Boot 4 release in November  -->
-    <spring-boot.version>4.0.0-M2</spring-boot.version>
+    <spring-boot.version>4.0.0-M3</spring-boot.version>
     <testcontainers.version>1.21.3</testcontainers.version>
     <testng.version>7.11.0</testng.version>
     <xmlunit-assertj3.version>2.10.3</xmlunit-assertj3.version>