Bump io.micronaut:micronaut-core from 3.9.4 to 4.0.0

Bumps [io.micronaut:micronaut-core](https://github.com/micronaut-projects/micronaut-core) from 3.9.4 to 4.0.0.
- [Release notes](https://github.com/micronaut-projects/micronaut-core/releases)
- [Changelog](https://github.com/micronaut-projects/micronaut-core/blob/4.0.x/RELEASE.adoc)
- [Commits](micronaut-projects/micronaut-core@v3.9.4...v4.0.0)

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

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

build.gradle.kts

@@ -22,7 +22,7 @@ group = "recce.server"
 // the Gradle DSL properly. Here we pick one of the versions where multiple artifacts are released at the same time
 // and use this to bump the others consistently.
 val depDescriptors = mapOf(
-    "micronaut" to "io.micronaut:micronaut-core:3.9.4",
+    "micronaut" to "io.micronaut:micronaut-core:4.0.0",
     "restAssured" to "io.rest-assured:rest-assured:4.5.1"
 )
 val depVersions = depDescriptors.mapValues { (_, v) -> v.split(':').last() } + mapOf(