Bump plugin.spring from 2.0.21 to 2.1.0

Bumps [plugin.spring](https://github.com/JetBrains/kotlin) from 2.0.21 to 2.1.0.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.1.0/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.21...v2.1.0)

---
updated-dependencies:
- dependency-name: plugin.spring
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle.kts

@@ -8,7 +8,7 @@ import java.net.URI
 plugins {
     id("io.spring.dependency-management") version "1.1.6" apply false
     kotlin("jvm") version "2.0.21" apply false
-    kotlin("plugin.spring") version "2.0.21" apply false
+    kotlin("plugin.spring") version "2.1.0" apply false
     id("org.sonarqube") version "5.1.0.4882"
     id("com.diffplug.spotless") version("6.25.0")
 }