deps: bump org.jetbrains.kotlin.jvm in /telemetry/jetbrains

Bumps org.jetbrains.kotlin.jvm from 2.0.20 to 2.0.21.

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

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

Author: dependabot[bot]

telemetry/jetbrains/gradle/libs.versions.toml

@@ -4,7 +4,7 @@ jackson = "2.17.2"
 # deprecated; should move to json-skema
 jsonSchema = "1.14.4"
 junit4 = "4.13.2"
-kotlin = "2.0.20"
+kotlin = "2.0.21"
 kotlin-poet = "1.18.1"
 nexus = "2.0.0"