Update dependency org.springframework.boot to v3.5.9 (#823)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ komapper = "5.7.0"
 kotlin = "2.3.0"
 ksp = "2.3.4"
 quarkus = "3.30.4"
-spring-boot = "3.5.8"
+spring-boot = "3.5.9"
 
 [libraries]
 komapper-platform = { module = "org.komapper:komapper-platform", version.ref = "komapper" }