Bump jvm from 2.2.20 to 2.2.21 (#531)

Bumps [jvm](https://github.com/JetBrains/kotlin) from 2.2.20 to 2.2.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.2.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.2.20...v2.2.21)

---
updated-dependencies:
- dependency-name: jvm
  dependency-version: 2.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

app/build.gradle.kts

@@ -1,7 +1,7 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
-    kotlin("jvm") version "2.2.20"
+    kotlin("jvm") version "2.2.21"
     id("io.ktor.plugin") version "3.3.1"
     application
 }