Merge pull request #487 from kit-data-manager/renovate/springbootversion

Update dependency org.springframework.boot:spring-boot-dependencies to v3.5.8

Author: VolkerHartmann

build.gradle

@@ -29,7 +29,7 @@ plugins {
 }
 
 ext { 
-    springBootVersion = '3.5.7' 
+    springBootVersion = '3.5.8' 
     springDocVersion  = '2.8.14'
 }