Bump org.jetbrains.kotlin.jvm from 1.5.10 to 1.5.20 in /examples

Bumps org.jetbrains.kotlin.jvm from 1.5.10 to 1.5.20.

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

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

examples/spring-boot-kotlin-redis/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id("org.springframework.boot") version "2.5.2"
-    id("org.jetbrains.kotlin.jvm") version "1.5.10"
+    id("org.jetbrains.kotlin.jvm") version "1.5.20"
     id("org.jetbrains.kotlin.plugin.spring") version "1.5.20"
 }