Bump io.javalin:javalin from 4.6.1 to 6.2.0

Bumps [io.javalin:javalin](https://github.com/javalin/javalin) from 4.6.1 to 6.2.0.
- [Release notes](https://github.com/javalin/javalin/releases)
- [Commits](javalin/javalin@javalin-parent-4.6.1...javalin-parent-6.2.0)

---
updated-dependencies:
- dependency-name: io.javalin:javalin
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

build.gradle

@@ -2,7 +2,7 @@ group 'io.realworld'
 version '1.0-SNAPSHOT'
 
 ext {
-    javalin_version = "4.6.1"
+    javalin_version = "6.2.0"
     jackson_version = "2.13.5"
     slf4j_version = "2.0.9"
     // not easy to update