Bump jvm from 1.9.0 to 1.9.20

Bumps jvm from 1.9.0 to 1.9.20.

---
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

@@ -1,6 +1,6 @@
 plugins {
     id("java")
-    kotlin("jvm") version "1.9.0"
+    kotlin("jvm") version "1.9.20"
     id("com.github.johnrengelman.shadow") version "8.1.1"
     id("xyz.jpenilla.run-paper") version "2.1.0"
     id("net.minecrell.plugin-yml.bukkit") version "0.6.0"