Bump io.javalin:javalin from 5.6.3 to 5.6.4 (#4798)

Bumps [io.javalin:javalin](https://github.com/javalin/javalin) from 5.6.3 to 5.6.4.
- [Release notes](https://github.com/javalin/javalin/releases)
- [Commits](javalin/javalin@javalin-parent-5.6.3...javalin-parent-5.6.4)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gradle/libs.versions.toml

@@ -130,7 +130,7 @@ hystrix = { module = "com.netflix.hystrix:hystrix-core", version.ref = "hystrix"
 jacksonDatabind = { module = "com.fasterxml.jackson.core:jackson-databind", version.ref = "jackson-databind" }
 jakarta-jmsApi = { module = "jakarta.jms:jakarta.jms-api", version = "3.0.0" }
 jakarta-servletApi = { module = "jakarta.servlet:jakarta.servlet-api", version = "5.0.0" }
-javalin = { module = "io.javalin:javalin", version = "5.6.3" }
+javalin = { module = "io.javalin:javalin", version = "5.6.4" }
 javax-cacheApi = { module = "javax.cache:cache-api", version.ref = "javax-cache" }
 javax-inject = { module = "javax.inject:javax.inject", version.ref = "javax-inject" }
 javax-servletApi = { module = "javax.servlet:javax.servlet-api", version = "4.0.1" }