chore(deps): update plugin org.springframework.boot to v3.5.8

Author: renovate[bot]

build.gradle.kts

@@ -4,7 +4,7 @@ import java.time.Duration
 plugins {
     kotlin("jvm") version "2.2.0"
     kotlin("plugin.spring") version "2.2.0"
-    id("org.springframework.boot") version "3.5.4"
+    id("org.springframework.boot") version "3.5.8"
     id("io.spring.dependency-management") version "1.1.7"
     id("java-library")
     id("signing")