chore(deps): bump jvm from 1.6.20 to 1.6.21

Bumps jvm from 1.6.20 to 1.6.21.

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

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

build.gradle.kts

@@ -22,7 +22,7 @@ val mainClassKt = "no.nav.security.mock.oauth2.StandaloneMockOAuth2ServerKt"
 
 plugins {
     application
-    kotlin("jvm") version "1.6.20"
+    kotlin("jvm") version "1.6.21"
     id("se.patrikerdes.use-latest-versions") version "0.2.18"
     id("com.github.ben-manes.versions") version "0.42.0"
     id("org.jmailen.kotlinter") version "3.10.0"