Update spring boot to v3.0.6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ kotest-spring = "1.1.2"
 graphql-java = "20.2"
 graphql-kickstart-spring-boot = "15.0.0"
 commons-text = "1.10.0"
-spring-boot = "3.0.5"
+spring-boot = "3.0.6"
 dgs = "6.0.4"
 
 [libraries]