Bump the kotlin group with 1 update

Bumps the kotlin group with 1 update: [com.google.devtools.ksp](https://github.com/google/ksp).

- [Release notes](https://github.com/google/ksp/releases)
- [Commits](google/ksp@1.9.21-1.0.15...1.9.21-1.0.16)

---
updated-dependencies:
- dependency-name: com.google.devtools.ksp
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: kotlin
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -10,7 +10,7 @@ plugins {
   id("io.freefair.maven-central.validate-poms") version "8.4"
   id("io.github.gradle-nexus.publish-plugin") version "1.3.0"
   id("org.jetbrains.kotlin.jvm") version "1.9.21" apply false
-  id("com.google.devtools.ksp") version "1.9.21-1.0.15" apply false
+  id("com.google.devtools.ksp") version "1.9.21-1.0.16" apply false
   id("org.openapi.generator") version "7.1.0" apply false
   id("org.jlleitschuh.gradle.ktlint") version "11.6.1" apply false
 }