Merge pull request #44 from neziw/renovate/spring-boot

Update plugin org.springframework.boot to v4.0.4

Author: neziw

build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '4.0.1'
+    id 'org.springframework.boot' version '4.0.4'
     id 'io.spring.dependency-management' version '1.1.7'
     id 'checkstyle'
 }