Update spring boot to v4.0.3 (#631)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -36,7 +36,7 @@
 
     <!-- Dependency versions - use ./mvnw versions:update-properties to update-->
     <!-- spring versions -->
-    <spring-boot.version>4.0.2</spring-boot.version>
+    <spring-boot.version>4.0.3</spring-boot.version>
     <spring-cloud.version>2025.1.1</spring-cloud.version>
     <spring-doc.version>3.0.1</spring-doc.version>