Upgrade to Spring Boot 3.5.6

Closes gh-1703

Author: mhalbritter

initializr-parent/pom.xml

@@ -35,7 +35,7 @@
 		<commons-text.version>1.14.0</commons-text.version>
 		<maven.version>3.9.11</maven.version>
 		<maven-resolver.version>1.9.24</maven-resolver.version>
-		<spring-boot.version>3.5.5</spring-boot.version>
+		<spring-boot.version>3.5.6</spring-boot.version>
 		<spring-cloud-contract.version>4.3.0</spring-cloud-contract.version>
 	</properties>
 	<scm>