Update dependency org.springframework.boot:spring-boot-dependencies to v4

Author: renovate[bot]

build.gradle

@@ -32,7 +32,7 @@ plugins {
 
 ext {
     // versions of dependencies
-    springBootVersion = '3.5.7'
+    springBootVersion = '4.0.0'
     springDocVersion  = '2.8.14'
     javersVersion     = '7.9.0'
 }