Bump org.springframework.boot from 3.1.2 to 3.2.1

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.1.2 to 3.2.1.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.2...v3.2.1)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle.kts

@@ -1,7 +1,7 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-    id("org.springframework.boot") version "3.1.2"
+    id("org.springframework.boot") version "3.2.1"
     id("io.spring.dependency-management") version "1.1.3"
     kotlin("jvm") version "1.9.0"
     kotlin("plugin.spring") version "1.9.0"